diff --git a/arch/arm/src/cxd56xx/cxd56_emmc.c b/arch/arm/src/cxd56xx/cxd56_emmc.c
index a7ddaeb96bb..903cac95474 100644
--- a/arch/arm/src/cxd56xx/cxd56_emmc.c
+++ b/arch/arm/src/cxd56xx/cxd56_emmc.c
@@ -824,7 +824,7 @@ static int cxd56_emmc_open(struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct cxd56_emmc_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Just increment the reference count on the driver */
 
@@ -845,7 +845,7 @@ static int cxd56_emmc_close(struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct cxd56_emmc_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Decrement the reference count on the block driver */
 
@@ -869,7 +869,7 @@ static ssize_t cxd56_emmc_read(struct inode *inode,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct cxd56_emmc_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   finfo("Read sector %" PRIuOFF " (%u sectors) to %p\n",
         start_sector, nsectors, buffer);
@@ -894,7 +894,7 @@ static ssize_t cxd56_emmc_write(struct inode *inode,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct cxd56_emmc_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   finfo("Write %p to sector %" PRIu32 " (%u sectors)\n", buffer,
         start_sector, nsectors);
@@ -916,7 +916,7 @@ static int cxd56_emmc_geometry(struct inode *inode,
   struct cxd56_emmc_state_s *priv;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct cxd56_emmc_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   memset(geometry, 0, sizeof(*geometry));
 
diff --git a/arch/arm/src/cxd56xx/cxd56_geofence.c b/arch/arm/src/cxd56xx/cxd56_geofence.c
index 9c9330756a5..4231364d9b4 100644
--- a/arch/arm/src/cxd56xx/cxd56_geofence.c
+++ b/arch/arm/src/cxd56xx/cxd56_geofence.c
@@ -555,7 +555,7 @@ static int cxd56_geofence_poll(struct file *filep,
   int                          i;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_geofence_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/arch/arm/src/cxd56xx/cxd56_gnss.c b/arch/arm/src/cxd56xx/cxd56_gnss.c
index ac101812e13..2aa3b4abedb 100644
--- a/arch/arm/src/cxd56xx/cxd56_gnss.c
+++ b/arch/arm/src/cxd56xx/cxd56_gnss.c
@@ -1031,7 +1031,7 @@ static int cxd56_gnss_check_cep_data(struct file *filep, unsigned long arg)
   struct cxd56_gnss_dev_s *priv;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Set a flag for checking CEP data  */
 
@@ -1569,7 +1569,7 @@ static int cxd56_gnss_set_signal(struct file *filep, unsigned long arg)
     }
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
@@ -2570,7 +2570,7 @@ static int cxd56_gnss_cpufifo_api(struct file *filep, unsigned int api,
   int                      ret = OK;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   type = CXD56_GNSS_CPUFIFOAPI_SET_DATA(api, data);
   cxd56_cpu1sigsend(CXD56_CPU1_DATA_TYPE_CPUFIFOAPI, type);
@@ -2711,7 +2711,7 @@ static int cxd56_gnss_open(struct file *filep)
   int                      retry = 50;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   while (!g_rtc_enabled && 0 < retry--)
     {
@@ -2812,7 +2812,7 @@ static int cxd56_gnss_close(struct file *filep)
   int                     ret = OK;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
@@ -2954,7 +2954,7 @@ static int cxd56_gnss_ioctl(struct file *filep, int cmd,
   int ret;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   if (cmd <= CXD56_GNSS_IOCTL_INVAL || cmd >= CXD56_GNSS_IOCTL_MAX)
     {
@@ -2998,7 +2998,7 @@ static int cxd56_gnss_poll(struct file *filep, struct pollfd *fds,
   int                      i;
 
   inode = filep->f_inode;
-  priv  = (struct cxd56_gnss_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/arch/arm/src/cxd56xx/cxd56_hostif.c b/arch/arm/src/cxd56xx/cxd56_hostif.c
index 5346df2482b..c0d5b11c174 100644
--- a/arch/arm/src/cxd56xx/cxd56_hostif.c
+++ b/arch/arm/src/cxd56xx/cxd56_hostif.c
@@ -200,7 +200,7 @@ static int hif_open(struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (struct cxd56_hifdev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Check parameters */
@@ -254,7 +254,7 @@ static int hif_close(struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (struct cxd56_hifdev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Decrement reference counter */
@@ -281,7 +281,7 @@ static ssize_t hif_read(struct file *filep, char *buffer, size_t len)
 
   inode = filep->f_inode;
 
-  priv = (struct cxd56_hifdev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Check parameters */
@@ -312,7 +312,7 @@ static ssize_t hif_write(struct file *filep,
 
   inode = filep->f_inode;
 
-  priv = (struct cxd56_hifdev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Check parameters */
diff --git a/arch/arm/src/cxd56xx/cxd56_sph.c b/arch/arm/src/cxd56xx/cxd56_sph.c
index aafc5d3c475..6f40e2cd6b5 100644
--- a/arch/arm/src/cxd56xx/cxd56_sph.c
+++ b/arch/arm/src/cxd56xx/cxd56_sph.c
@@ -115,7 +115,7 @@ static int sph_open(struct file *filep)
 static int sph_ioctl(struct file *filep, int cmd, unsigned long arg)
 {
   struct sph_dev_s *priv =
-    (struct sph_dev_s *)filep->f_inode->i_private;
+    filep->f_inode->i_private;
   int ret = -ENOTTY;
 
   hsinfo("cmd = %x\n", cmd);
diff --git a/arch/arm/src/lc823450/lc823450_mmcl.c b/arch/arm/src/lc823450/lc823450_mmcl.c
index 6db08683d4b..c94487d7afd 100644
--- a/arch/arm/src/lc823450/lc823450_mmcl.c
+++ b/arch/arm/src/lc823450/lc823450_mmcl.c
@@ -132,7 +132,7 @@ static ssize_t mmcl_read(struct inode *inode, unsigned char *buffer,
   finfo("sector: %" PRIuOFF " nsectors: %u\n", start_sector, nsectors);
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct mmcl_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   nread = MTD_BREAD(dev->mtd, start_sector, nsectors, buffer);
   if (nread != nsectors)
@@ -162,7 +162,7 @@ static ssize_t mmcl_write(struct inode *inode,
   finfo("sector: %" PRIuOFF " nsectors: %u\n", start_sector, nsectors);
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct mmcl_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   nwrite = MTD_BWRITE(dev->mtd, start_sector, nsectors, buffer);
   if (nwrite != nsectors)
@@ -190,7 +190,7 @@ static int mmcl_geometry(struct inode *inode, struct geometry *geometry)
 
   if (geometry)
     {
-      dev = (struct mmcl_dev_s *)inode->i_private;
+      dev = inode->i_private;
 
       memset(geometry, 0, sizeof(*geometry));
 
@@ -226,7 +226,7 @@ static int mmcl_ioctl(struct inode *inode, int cmd, unsigned long arg)
   finfo("Entry\n");
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct mmcl_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = MTD_IOCTL(dev->mtd, cmd, arg);
   if (ret < 0)
diff --git a/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c b/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c
index 849b325cea2..6baf8a6254d 100644
--- a/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c
+++ b/arch/arm/src/s32k1xx/s32k1xx_eeeprom.c
@@ -157,7 +157,7 @@ static int eeed_open(struct inode *inode)
   struct eeed_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct eeed_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Increment the open reference count */
 
@@ -182,7 +182,7 @@ static int eeed_close(struct inode *inode)
   struct eeed_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct eeed_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Increment the open reference count */
 
@@ -207,7 +207,7 @@ static ssize_t eeed_read(struct inode *inode, unsigned char *buffer,
   struct eeed_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct eeed_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   finfo("sector: %" PRIu64 " nsectors: %u sectorsize: %d\n",
         start_sector, nsectors, dev->eeed_sectsize);
@@ -244,7 +244,7 @@ static ssize_t eeed_write(struct inode *inode,
   struct eeed_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct eeed_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   finfo("sector: %" PRIu64 " nsectors: %u sectorsize: %d\n",
         start_sector, nsectors, dev->eeed_sectsize);
@@ -290,7 +290,7 @@ static int eeed_geometry(struct inode *inode, struct geometry *geometry)
 
   if (geometry)
     {
-      dev = (struct eeed_struct_s *)inode->i_private;
+      dev = inode->i_private;
 
       memset(geometry, 0, sizeof(*geometry));
 
@@ -331,7 +331,7 @@ static int eeed_ioctl(struct inode *inode, int cmd, unsigned long arg)
   DEBUGASSERT(inode->i_private);
   if (cmd == BIOC_XIPBASE && ppv)
     {
-      dev  = (struct eeed_struct_s *)inode->i_private;
+      dev  = inode->i_private;
       *ppv = (void *)dev->eeed_buffer;
 
       finfo("ppv: %p\n", *ppv);
@@ -355,7 +355,7 @@ static int eeed_unlink(struct inode *inode)
   struct eeed_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct eeed_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* And free the block driver itself */
 
diff --git a/arch/arm/src/sama5/sam_tsd.c b/arch/arm/src/sama5/sam_tsd.c
index b3303bc6980..2fdbf252a16 100644
--- a/arch/arm/src/sama5/sam_tsd.c
+++ b/arch/arm/src/sama5/sam_tsd.c
@@ -973,7 +973,7 @@ static ssize_t sam_tsd_read(struct file *filep, char *buffer, size_t len)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct sam_tsd_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -1107,7 +1107,7 @@ static int sam_tsd_ioctl(struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct sam_tsd_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1166,7 +1166,7 @@ static int sam_tsd_poll(struct file *filep, struct pollfd *fds, bool setup)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (struct sam_tsd_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the ADC hardware */
 
diff --git a/arch/arm/src/stm32/stm32_bbsram.c b/arch/arm/src/stm32/stm32_bbsram.c
index edbabc7277b..ba8dc30a5c4 100644
--- a/arch/arm/src/stm32/stm32_bbsram.c
+++ b/arch/arm/src/stm32/stm32_bbsram.c
@@ -255,7 +255,7 @@ static int stm32_bbsram_open(struct file *filep)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Increment the reference count */
 
@@ -310,7 +310,7 @@ static int stm32_bbsram_close(struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -358,7 +358,7 @@ static off_t stm32_bbsram_seek(struct file *filep, off_t offset,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -428,7 +428,7 @@ static ssize_t stm32_bbsram_read(struct file *filep, char *buffer,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -474,7 +474,7 @@ static ssize_t stm32_bbsram_write(struct file *filep,
   int ret = -EFBIG;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Forbid writes past the end of the device */
 
@@ -538,7 +538,7 @@ static int stm32_bbsram_ioctl(struct file *filep, int cmd,
   int ret = -ENOTTY;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   if (cmd == STM32_BBSRAM_GETDESC_IOCTL)
     {
@@ -591,7 +591,7 @@ static int stm32_bbsram_unlink(struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
diff --git a/arch/arm/src/stm32f7/stm32_bbsram.c b/arch/arm/src/stm32f7/stm32_bbsram.c
index 80793e5183e..d47e82574e7 100644
--- a/arch/arm/src/stm32f7/stm32_bbsram.c
+++ b/arch/arm/src/stm32f7/stm32_bbsram.c
@@ -255,7 +255,7 @@ static int stm32_bbsram_open(struct file *filep)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Increment the reference count */
 
@@ -310,7 +310,7 @@ static int stm32_bbsram_close(struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -358,7 +358,7 @@ static off_t stm32_bbsram_seek(struct file *filep, off_t offset,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -428,7 +428,7 @@ static ssize_t stm32_bbsram_read(struct file *filep, char *buffer,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -474,7 +474,7 @@ static ssize_t stm32_bbsram_write(struct file *filep,
   int ret = -EFBIG;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Forbid writes past the end of the device */
 
@@ -538,7 +538,7 @@ static int stm32_bbsram_ioctl(struct file *filep, int cmd,
   int ret = -ENOTTY;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   if (cmd == STM32F7_BBSRAM_GETDESC_IOCTL)
     {
@@ -591,7 +591,7 @@ static int stm32_bbsram_unlink(struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
diff --git a/arch/arm/src/stm32h7/stm32_bbsram.c b/arch/arm/src/stm32h7/stm32_bbsram.c
index 18ffaed647d..e4af5c98f5c 100644
--- a/arch/arm/src/stm32h7/stm32_bbsram.c
+++ b/arch/arm/src/stm32h7/stm32_bbsram.c
@@ -301,7 +301,7 @@ static int stm32_bbsram_open(struct file *filep)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Increment the reference count */
 
@@ -356,7 +356,7 @@ static int stm32_bbsram_close(struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -404,7 +404,7 @@ static off_t stm32_bbsram_seek(struct file *filep, off_t offset,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -474,7 +474,7 @@ static ssize_t stm32_bbsram_read(struct file *filep, char *buffer,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
@@ -521,7 +521,7 @@ static ssize_t stm32_bbsram_write(struct file *filep,
   int ret = -EFBIG;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Forbid writes past the end of the device */
 
@@ -585,7 +585,7 @@ static int stm32_bbsram_ioctl(struct file *filep, int cmd,
   int ret = -ENOTTY;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   if (cmd == STM32H7_BBSRAM_GETDESC_IOCTL)
     {
@@ -638,7 +638,7 @@ static int stm32_bbsram_unlink(struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct stm32_bbsram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   ret = nxmutex_lock(&bbr->lock);
   if (ret < 0)
diff --git a/arch/renesas/src/rx65n/rx65n_sbram.c b/arch/renesas/src/rx65n/rx65n_sbram.c
index 50e709e556a..e5d51dc03e6 100644
--- a/arch/renesas/src/rx65n/rx65n_sbram.c
+++ b/arch/renesas/src/rx65n/rx65n_sbram.c
@@ -207,7 +207,7 @@ static int rx65n_sbram_open(struct file *filep)
   struct rx65n_sbram_s *bbr;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Increment the reference count */
 
@@ -258,7 +258,7 @@ static int rx65n_sbram_close(struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   nxmutex_lock(&bbr->lock);
 
@@ -300,7 +300,7 @@ static off_t rx65n_sbram_seek(struct file *filep, off_t offset,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   nxmutex_lock(&bbr->lock);
 
@@ -369,7 +369,7 @@ static ssize_t rx65n_sbram_read(struct file *filep, char *buffer,
   struct rx65n_sbram_s *bbr;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   nxmutex_lock(&bbr->lock);
 
@@ -411,7 +411,7 @@ static ssize_t rx65n_sbram_write(struct file *filep, const char *buffer,
   int ret = -EFBIG;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   /* Forbid writes past the end of the device */
 
@@ -467,7 +467,7 @@ static int rx65n_sbram_ioctl(struct file *filep, int cmd, unsigned long arg)
   int ret = -ENOTTY;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   if (cmd == RX65N_SBRAM_GETDESC_IOCTL)
     {
@@ -514,7 +514,7 @@ static int rx65n_sbram_unlink(struct inode *inode)
   struct rx65n_sbram_s *bbr;
 
   DEBUGASSERT(inode->i_private);
-  bbr = (struct rx65n_sbram_s *)inode->i_private;
+  bbr = inode->i_private;
 
   nxmutex_lock(&bbr->lock);
   memset(bbr->bbf->data, 0, bbr->bbf->len);
diff --git a/boards/arm/s32k1xx/rddrone-bms772/src/s32k1xx_smbus_sbd.c b/boards/arm/s32k1xx/rddrone-bms772/src/s32k1xx_smbus_sbd.c
index 5f25f5510fd..9308d4130fa 100644
--- a/boards/arm/s32k1xx/rddrone-bms772/src/s32k1xx_smbus_sbd.c
+++ b/boards/arm/s32k1xx/rddrone-bms772/src/s32k1xx_smbus_sbd.c
@@ -127,7 +127,7 @@ static int smbus_sbd_open(struct file *filep)
   /* Retrieve the smbus_sbd_dev_s struct */
 
   DEBUGASSERT(filep->f_inode->i_private);
-  dev = (struct smbus_sbd_dev_s *)filep->f_inode->i_private;
+  dev = filep->f_inode->i_private;
 
   /* Increase the open reference count */
 
@@ -159,7 +159,7 @@ static int smbus_sbd_close(struct file *filep)
   /* Retrieve the smbus_sbd_dev_s struct */
 
   DEBUGASSERT(filep->f_inode->i_private);
-  dev = (struct smbus_sbd_dev_s *)filep->f_inode->i_private;
+  dev = filep->f_inode->i_private;
 
   /* Decrease the open reference count */
 
@@ -223,7 +223,7 @@ static ssize_t smbus_sbd_read(struct file *filep, char *buffer,
    */
 
   DEBUGASSERT(filep->f_inode->i_private);
-  dev = (struct smbus_sbd_dev_s *)filep->f_inode->i_private;
+  dev = filep->f_inode->i_private;
 
   DEBUGASSERT(buffer);
   read_data = (struct smbus_sbd_data_s *)buffer;
@@ -321,7 +321,7 @@ static ssize_t smbus_sbd_write(struct file *filep, const char *buffer,
    */
 
   DEBUGASSERT(filep->f_inode->i_private);
-  dev = (struct smbus_sbd_dev_s *)filep->f_inode->i_private;
+  dev = filep->f_inode->i_private;
 
   DEBUGASSERT(buffer);
   new_data = (struct smbus_sbd_data_s *)buffer;
diff --git a/boards/arm/stm32/mikroe-stm32f4/src/stm32_touchscreen.c b/boards/arm/stm32/mikroe-stm32f4/src/stm32_touchscreen.c
index 22afd22d128..90bdd9f86a9 100644
--- a/boards/arm/stm32/mikroe-stm32f4/src/stm32_touchscreen.c
+++ b/boards/arm/stm32/mikroe-stm32f4/src/stm32_touchscreen.c
@@ -1098,7 +1098,7 @@ static int tc_open(struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1149,7 +1149,7 @@ static int tc_close(struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1189,7 +1189,7 @@ static ssize_t tc_read(struct file *filep, char *buffer, size_t len)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -1312,7 +1312,7 @@ static int tc_ioctl(struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1354,7 +1354,7 @@ static int tc_poll(struct file *filep, struct pollfd *fds, bool setup)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/boards/mips/pic32mx/pic32mx7mmb/src/pic32_touchscreen.c b/boards/mips/pic32mx/pic32mx7mmb/src/pic32_touchscreen.c
index 7ee9c851650..243ca040d9a 100644
--- a/boards/mips/pic32mx/pic32mx7mmb/src/pic32_touchscreen.c
+++ b/boards/mips/pic32mx/pic32mx7mmb/src/pic32_touchscreen.c
@@ -975,7 +975,7 @@ static int tc_open(struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1026,7 +1026,7 @@ static int tc_close(struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1066,7 +1066,7 @@ static ssize_t tc_read(struct file *filep, char *buffer, size_t len)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -1189,7 +1189,7 @@ static int tc_ioctl(struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1231,7 +1231,7 @@ static int tc_poll(struct file *filep, struct pollfd *fds, bool setup)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (struct tc_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/bch/bchdev_driver.c b/drivers/bch/bchdev_driver.c
index 26992d0d493..e6a01dcf0fe 100644
--- a/drivers/bch/bchdev_driver.c
+++ b/drivers/bch/bchdev_driver.c
@@ -119,7 +119,7 @@ static int bch_open(FAR struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
 
   /* Increment the reference count */
 
@@ -156,7 +156,7 @@ static int bch_close(FAR struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
 
   /* Get exclusive access */
 
@@ -225,7 +225,7 @@ static off_t bch_seek(FAR struct file *filep, off_t offset, int whence)
 
   DEBUGASSERT(inode->i_private);
 
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
   ret = nxmutex_lock(&bch->lock);
   if (ret < 0)
     {
@@ -295,7 +295,7 @@ static ssize_t bch_read(FAR struct file *filep, FAR char *buffer, size_t len)
   ssize_t ret;
 
   DEBUGASSERT(inode->i_private);
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
 
   ret = nxmutex_lock(&bch->lock);
   if (ret < 0)
@@ -325,7 +325,7 @@ static ssize_t bch_write(FAR struct file *filep, FAR const char *buffer,
   ssize_t ret = -EACCES;
 
   DEBUGASSERT(inode->i_private);
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
 
   if (!bch->readonly)
     {
@@ -362,7 +362,7 @@ static int bch_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   int ret = -ENOTTY;
 
   DEBUGASSERT(inode->i_private);
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
 
   /* Process the call according to the command */
 
@@ -474,7 +474,7 @@ static int bch_unlink(FAR struct inode *inode)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  bch = (FAR struct bchlib_s *)inode->i_private;
+  bch = inode->i_private;
 
   /* Get exclusive access to the BCH device */
 
diff --git a/drivers/can/can.c b/drivers/can/can.c
index f5090c772f4..2b24e812256 100644
--- a/drivers/can/can.c
+++ b/drivers/can/can.c
@@ -1009,7 +1009,7 @@ static int can_poll(FAR struct file *filep, FAR struct pollfd *fds,
                     bool setup)
 {
   FAR struct inode *inode = (FAR struct inode *)filep->f_inode;
-  FAR struct can_dev_s *dev = (FAR struct can_dev_s *)inode->i_private;
+  FAR struct can_dev_s *dev = inode->i_private;
   FAR struct can_reader_s *reader = NULL;
   pollevent_t eventset;
   int ndx;
diff --git a/drivers/eeprom/i2c_xx24xx.c b/drivers/eeprom/i2c_xx24xx.c
index 15c7a3286be..722cfe5afbf 100644
--- a/drivers/eeprom/i2c_xx24xx.c
+++ b/drivers/eeprom/i2c_xx24xx.c
@@ -346,7 +346,7 @@ static int ee24xx_open(FAR struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -383,7 +383,7 @@ static int ee24xx_close(FAR struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -423,7 +423,7 @@ static off_t ee24xx_seek(FAR struct file *filep, off_t offset, int whence)
   FAR struct inode        *inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -499,7 +499,7 @@ static ssize_t ee24xx_read(FAR struct file *filep, FAR char *buffer,
   int                      ret;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -578,7 +578,7 @@ static ssize_t at24cs_read_uuid(FAR struct file *filep, FAR char *buffer,
   int                      ret;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -654,7 +654,7 @@ static ssize_t ee24xx_write(FAR struct file *filep, FAR const char *buffer,
   int                      savelen;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   if (eedev->readonly)
     {
@@ -780,7 +780,7 @@ static int ee24xx_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   int                      ret   = 0;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee24xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
   UNUSED(eedev);
 
   switch (cmd)
diff --git a/drivers/eeprom/spi_xx25xx.c b/drivers/eeprom/spi_xx25xx.c
index bfd88d8c959..71bd5927bc4 100644
--- a/drivers/eeprom/spi_xx25xx.c
+++ b/drivers/eeprom/spi_xx25xx.c
@@ -468,7 +468,7 @@ static int ee25xx_open(FAR struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee25xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -505,7 +505,7 @@ static int ee25xx_close(FAR struct file *filep)
   int ret = OK;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee25xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -545,7 +545,7 @@ static off_t ee25xx_seek(FAR struct file *filep, off_t offset, int whence)
   FAR struct inode        *inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee25xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -617,7 +617,7 @@ static ssize_t ee25xx_read(FAR struct file *filep, FAR char *buffer,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee25xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   ret = nxmutex_lock(&eedev->lock);
   if (ret < 0)
@@ -669,7 +669,7 @@ static ssize_t ee25xx_write(FAR struct file *filep, FAR const char *buffer,
   int                     ret    = -EACCES;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee25xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
 
   if (eedev->readonly)
     {
@@ -766,7 +766,7 @@ static int ee25xx_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   int                     ret    = 0;
 
   DEBUGASSERT(inode->i_private);
-  eedev = (FAR struct ee25xx_dev_s *)inode->i_private;
+  eedev = inode->i_private;
   UNUSED(eedev);
 
   switch (cmd)
diff --git a/drivers/i2c/i2c_driver.c b/drivers/i2c/i2c_driver.c
index 5419fd5a11e..3b18f83399d 100644
--- a/drivers/i2c/i2c_driver.c
+++ b/drivers/i2c/i2c_driver.c
@@ -126,7 +126,7 @@ static int i2cdrvr_open(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct i2c_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Get exclusive access to the I2C driver state structure */
@@ -162,7 +162,7 @@ static int i2cdrvr_close(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct i2c_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Get exclusive access to the I2C driver state structure */
@@ -231,7 +231,7 @@ static int i2cdrvr_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct i2c_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
@@ -306,7 +306,7 @@ static int i2cdrvr_unlink(FAR struct inode *inode)
   /* Get our private data structure */
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct i2c_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the I2C driver state structure */
 
diff --git a/drivers/i2s/i2schar.c b/drivers/i2s/i2schar.c
index 92a358bc1cc..841159efecc 100644
--- a/drivers/i2s/i2schar.c
+++ b/drivers/i2s/i2schar.c
@@ -221,7 +221,7 @@ static ssize_t i2schar_read(FAR struct file *filep, FAR char *buffer,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct i2schar_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Verify that the buffer refers to one, correctly sized audio buffer */
@@ -293,7 +293,7 @@ static ssize_t i2schar_write(FAR struct file *filep, FAR const char *buffer,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct i2schar_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Verify that the buffer refers to one, correctly sized audio buffer */
@@ -358,7 +358,7 @@ static int i2schar_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct i2schar_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL && priv->i2s && priv->i2s->ops);
 
   if (priv->i2s->ops->i2s_ioctl)
diff --git a/drivers/input/ads7843e.c b/drivers/input/ads7843e.c
index 6cfc6ce48fa..cfb3cf3de47 100644
--- a/drivers/input/ads7843e.c
+++ b/drivers/input/ads7843e.c
@@ -716,7 +716,7 @@ static int ads7843e_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ads7843e_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -769,7 +769,7 @@ static int ads7843e_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ads7843e_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -812,7 +812,7 @@ static ssize_t ads7843e_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ads7843e_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -938,7 +938,7 @@ static int ads7843e_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ads7843e_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -994,7 +994,7 @@ static int ads7843e_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ads7843e_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/input/ajoystick.c b/drivers/input/ajoystick.c
index 34d10744e01..6e6c323e532 100644
--- a/drivers/input/ajoystick.c
+++ b/drivers/input/ajoystick.c
@@ -299,7 +299,7 @@ static int ajoy_open(FAR struct file *filep)
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct ajoy_upperhalf_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Allocate a new open structure */
 
@@ -355,7 +355,7 @@ static int ajoy_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ajoy_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   flags = enter_critical_section();
 
@@ -417,7 +417,7 @@ static ssize_t ajoy_read(FAR struct file *filep, FAR char *buffer,
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ajoy_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Make sure that the buffer is sufficiently large to hold at least one
    * complete sample.
@@ -467,7 +467,7 @@ static int ajoy_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ajoy_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
diff --git a/drivers/input/button_upper.c b/drivers/input/button_upper.c
index 16818c79c4b..2756c3cebe2 100644
--- a/drivers/input/button_upper.c
+++ b/drivers/input/button_upper.c
@@ -311,7 +311,7 @@ static int btn_open(FAR struct file *filep)
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct btn_upperhalf_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Allocate a new open structure */
 
@@ -367,7 +367,7 @@ static int btn_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct btn_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
@@ -434,7 +434,7 @@ static ssize_t btn_read(FAR struct file *filep, FAR char *buffer,
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct btn_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Make sure that the buffer is sufficiently large to hold at least one
    * complete sample.
@@ -478,7 +478,7 @@ static ssize_t btn_write(FAR struct file *filep, FAR const char *buffer,
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct btn_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Make sure that the buffer is sufficiently large to hold at least one
    * complete sample.
@@ -530,7 +530,7 @@ static int btn_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct btn_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
@@ -657,7 +657,7 @@ static int btn_poll(FAR struct file *filep, FAR struct pollfd *fds,
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct btn_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
diff --git a/drivers/input/cypress_mbr3108.c b/drivers/input/cypress_mbr3108.c
index 049ee5653a0..90dfd847e32 100644
--- a/drivers/input/cypress_mbr3108.c
+++ b/drivers/input/cypress_mbr3108.c
@@ -988,7 +988,7 @@ static int mbr3108_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct mbr3108_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/drivers/input/djoystick.c b/drivers/input/djoystick.c
index c931a55fce9..37a1c98d6d1 100644
--- a/drivers/input/djoystick.c
+++ b/drivers/input/djoystick.c
@@ -299,7 +299,7 @@ static int djoy_open(FAR struct file *filep)
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct djoy_upperhalf_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Allocate a new open structure */
 
@@ -355,7 +355,7 @@ static int djoy_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct djoy_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   flags = enter_critical_section();
 
@@ -417,7 +417,7 @@ static ssize_t djoy_read(FAR struct file *filep, FAR char *buffer,
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct djoy_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Make sure that the buffer is sufficiently large to hold at least one
    * complete sample.
@@ -463,7 +463,7 @@ static int djoy_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct djoy_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
diff --git a/drivers/input/ft5x06.c b/drivers/input/ft5x06.c
index 7ae37dff211..f174e38911d 100644
--- a/drivers/input/ft5x06.c
+++ b/drivers/input/ft5x06.c
@@ -735,7 +735,7 @@ static int ft5x06_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ft5x06_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -793,7 +793,7 @@ static int ft5x06_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ft5x06_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -840,7 +840,7 @@ static ssize_t ft5x06_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ft5x06_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -912,7 +912,7 @@ static int ft5x06_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ft5x06_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -969,7 +969,7 @@ static int ft5x06_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct ft5x06_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/input/gt9xx.c b/drivers/input/gt9xx.c
index 646775c6477..45492a958b8 100644
--- a/drivers/input/gt9xx.c
+++ b/drivers/input/gt9xx.c
@@ -762,7 +762,7 @@ static int gt9xx_poll(FAR struct file *filep, FAR struct pollfd *fds,
   DEBUGASSERT(fds);
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct gt9xx_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Begin Mutex: Lock to prevent concurrent update to Poll Waiters */
 
diff --git a/drivers/input/max11802.c b/drivers/input/max11802.c
index 016d1accf63..a1cbd3c82c9 100644
--- a/drivers/input/max11802.c
+++ b/drivers/input/max11802.c
@@ -709,7 +709,7 @@ static int max11802_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct max11802_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -762,7 +762,7 @@ static int max11802_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct max11802_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -805,7 +805,7 @@ static ssize_t max11802_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct max11802_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -931,7 +931,7 @@ static int max11802_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct max11802_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -987,7 +987,7 @@ static int max11802_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct max11802_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/input/mxt.c b/drivers/input/mxt.c
index e7d09bb8435..752ec892677 100644
--- a/drivers/input/mxt.c
+++ b/drivers/input/mxt.c
@@ -1107,7 +1107,7 @@ static int mxt_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct mxt_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1184,7 +1184,7 @@ static int mxt_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct mxt_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1238,7 +1238,7 @@ static ssize_t mxt_read(FAR struct file *filep, FAR char *buffer, size_t len)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct mxt_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -1464,7 +1464,7 @@ static int mxt_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct mxt_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1521,7 +1521,7 @@ static int mxt_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct mxt_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/input/nunchuck.c b/drivers/input/nunchuck.c
index 3d0324db81c..7c357b82d17 100644
--- a/drivers/input/nunchuck.c
+++ b/drivers/input/nunchuck.c
@@ -277,7 +277,7 @@ static int nunchuck_open(FAR struct file *filep)
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct nunchuck_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
@@ -333,7 +333,7 @@ static int nunchuck_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct nunchuck_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Handle an improbable race conditions with the following atomic test
    * and set.
@@ -415,7 +415,7 @@ static ssize_t nunchuck_read(FAR struct file *filep, FAR char *buffer,
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct nunchuck_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Make sure that the buffer is sufficiently large to hold at least one
    * complete sample.
@@ -463,7 +463,7 @@ static int nunchuck_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   DEBUGASSERT(filep->f_priv);
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct nunchuck_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
diff --git a/drivers/input/stmpe811_tsc.c b/drivers/input/stmpe811_tsc.c
index 4f526ef62bd..a3c0cc88ae4 100644
--- a/drivers/input/stmpe811_tsc.c
+++ b/drivers/input/stmpe811_tsc.c
@@ -311,7 +311,7 @@ static int stmpe811_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct stmpe811_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -367,7 +367,7 @@ static int stmpe811_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct stmpe811_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -414,7 +414,7 @@ static ssize_t stmpe811_read(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct stmpe811_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -538,7 +538,7 @@ static int stmpe811_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct stmpe811_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -631,7 +631,7 @@ static int stmpe811_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct stmpe811_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/input/tsc2007.c b/drivers/input/tsc2007.c
index 99a6fd61aaf..9b35f933e9f 100644
--- a/drivers/input/tsc2007.c
+++ b/drivers/input/tsc2007.c
@@ -779,7 +779,7 @@ static int tsc2007_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct tsc2007_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -831,7 +831,7 @@ static int tsc2007_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct tsc2007_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -873,7 +873,7 @@ static ssize_t tsc2007_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct tsc2007_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the touch data.
@@ -1003,7 +1003,7 @@ static int tsc2007_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct tsc2007_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1076,7 +1076,7 @@ static int tsc2007_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct tsc2007_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Are we setting up the poll?  Or tearing it down? */
 
diff --git a/drivers/lcd/ht16k33_14seg.c b/drivers/lcd/ht16k33_14seg.c
index 5d4c7b200a4..78bf94dd03d 100644
--- a/drivers/lcd/ht16k33_14seg.c
+++ b/drivers/lcd/ht16k33_14seg.c
@@ -892,7 +892,7 @@ static off_t ht16k33_seek(FAR struct file *filep, off_t offset, int whence)
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct ht16k33_dev_s *priv =
-    (FAR struct ht16k33_dev_s *)inode->i_private;
+    inode->i_private;
   off_t maxpos;
   off_t pos;
 
@@ -994,7 +994,7 @@ static int ht16k33_ioctl(FAR struct file *filep, int cmd,
         {
           FAR struct inode *inode = filep->f_inode;
           FAR struct ht16k33_dev_s *priv =
-            (FAR struct ht16k33_dev_s *)inode->i_private;
+            inode->i_private;
           FAR struct slcd_curpos_s *attr =
             (FAR struct slcd_curpos_s *)((uintptr_t)arg);
 
@@ -1007,7 +1007,7 @@ static int ht16k33_ioctl(FAR struct file *filep, int cmd,
         {
           FAR struct inode *inode = filep->f_inode;
           FAR struct ht16k33_dev_s *priv =
-            (FAR struct ht16k33_dev_s *)inode->i_private;
+            inode->i_private;
 
           nxmutex_lock(&priv->lock);
           *(FAR int *)((uintptr_t)arg) = 1; /* Hardcoded */
@@ -1019,7 +1019,7 @@ static int ht16k33_ioctl(FAR struct file *filep, int cmd,
         {
           FAR struct inode *inode = filep->f_inode;
           FAR struct ht16k33_dev_s *priv =
-            (FAR struct ht16k33_dev_s *)inode->i_private;
+            inode->i_private;
 
           nxmutex_lock(&priv->lock);
           ht16k33_setcontrast(priv, 0, (uint8_t)arg);
diff --git a/drivers/lcd/lcd_dev.c b/drivers/lcd/lcd_dev.c
index 37178f0c1e6..7382846bed9 100644
--- a/drivers/lcd/lcd_dev.c
+++ b/drivers/lcd/lcd_dev.c
@@ -89,7 +89,7 @@ static int lcddev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   FAR struct lcddev_dev_s *priv;
   int ret = OK;
 
-  priv = (FAR struct lcddev_dev_s *)filep->f_inode->i_private;
+  priv = filep->f_inode->i_private;
 
   switch (cmd)
     {
diff --git a/drivers/lcd/pcf8574_lcd_backpack.c b/drivers/lcd/pcf8574_lcd_backpack.c
index 011d888a5b7..8d0dad868b5 100644
--- a/drivers/lcd/pcf8574_lcd_backpack.c
+++ b/drivers/lcd/pcf8574_lcd_backpack.c
@@ -1026,7 +1026,7 @@ static int pcf8574_lcd_open(FAR struct file *filep)
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct pcf8574_lcd_dev_s *priv =
-    (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+    inode->i_private;
 
   /* Increment the reference count */
 
@@ -1057,7 +1057,7 @@ static int pcf8574_lcd_close(FAR struct file *filep)
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct pcf8574_lcd_dev_s *priv =
-    (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+    inode->i_private;
   int ret;
 
   /* Decrement the reference count */
@@ -1103,7 +1103,7 @@ static ssize_t pcf8574_lcd_read(FAR struct file *filep, FAR char *buffer,
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct pcf8574_lcd_dev_s *priv =
-    (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+    inode->i_private;
   int nidx;
   uint8_t addr;
   uint8_t row;
@@ -1185,7 +1185,7 @@ static ssize_t pcf8574_lcd_write(FAR struct file *filep,
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct pcf8574_lcd_dev_s *priv =
-    (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+    inode->i_private;
   struct lib_meminstream_s instream;
   uint8_t row;
   uint8_t col;
@@ -1342,7 +1342,7 @@ static off_t pcf8574_lcd_seek(FAR struct file *filep, off_t offset,
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct pcf8574_lcd_dev_s *priv =
-    (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+    inode->i_private;
   off_t pos;
   int maxpos;
 
@@ -1425,7 +1425,7 @@ static int pcf8574_lcd_ioctl(FAR struct file *filep, int cmd,
       {
         FAR struct inode *inode = filep->f_inode;
         FAR struct pcf8574_lcd_dev_s *priv =
-          (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+          inode->i_private;
         FAR struct slcd_attributes_s *attr =
           (FAR struct slcd_attributes_s *)((uintptr_t) arg);
 
@@ -1448,7 +1448,7 @@ static int pcf8574_lcd_ioctl(FAR struct file *filep, int cmd,
       {
         FAR struct inode *inode = filep->f_inode;
         FAR struct pcf8574_lcd_dev_s *priv =
-          (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+          inode->i_private;
         FAR struct slcd_curpos_s *attr =
           (FAR struct slcd_curpos_s *)((uintptr_t) arg);
         uint8_t row;
@@ -1468,7 +1468,7 @@ static int pcf8574_lcd_ioctl(FAR struct file *filep, int cmd,
       {
         FAR struct inode *inode = filep->f_inode;
         FAR struct pcf8574_lcd_dev_s *priv =
-          (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+          inode->i_private;
         bool bon;
 
         bon = (priv->bl_bit && priv->cfg.bl_active_high) ||
@@ -1481,7 +1481,7 @@ static int pcf8574_lcd_ioctl(FAR struct file *filep, int cmd,
       {
         FAR struct inode *inode = filep->f_inode;
         FAR struct pcf8574_lcd_dev_s *priv =
-          (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+          inode->i_private;
 
         nxmutex_lock(&priv->lock);
         lcd_backlight(priv, arg ? true : false);
@@ -1493,7 +1493,7 @@ static int pcf8574_lcd_ioctl(FAR struct file *filep, int cmd,
       {
         FAR struct inode *inode = filep->f_inode;
         FAR struct pcf8574_lcd_dev_s *priv =
-          (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+          inode->i_private;
         FAR struct slcd_createchar_s *attr =
           (FAR struct slcd_createchar_s *)((uintptr_t) arg);
 
@@ -1540,7 +1540,7 @@ static int pcf8574_lcd_poll(FAR struct file *filep, FAR struct pollfd *fds,
 static int pcf8574_lcd_unlink(FAR struct inode *inode)
 {
   FAR struct pcf8574_lcd_dev_s *priv =
-    (FAR struct pcf8574_lcd_dev_s *)inode->i_private;
+    inode->i_private;
   int ret = OK;
 
   nxmutex_lock(&priv->lock);
diff --git a/drivers/lcd/st7032.c b/drivers/lcd/st7032.c
index ea112779124..354eccf8d50 100644
--- a/drivers/lcd/st7032.c
+++ b/drivers/lcd/st7032.c
@@ -821,7 +821,7 @@ static off_t st7032_seek(FAR struct file *filep, off_t offset, int whence)
 {
   FAR struct inode *inode = filep->f_inode;
   FAR struct st7032_dev_s *priv =
-    (FAR struct st7032_dev_s *)inode->i_private;
+    inode->i_private;
   off_t maxpos;
   off_t pos;
 
@@ -924,7 +924,7 @@ static int st7032_ioctl(FAR struct file *filep, int cmd,
         {
           FAR struct inode *inode = filep->f_inode;
           FAR struct st7032_dev_s *priv =
-            (FAR struct st7032_dev_s *)inode->i_private;
+            inode->i_private;
           FAR struct slcd_curpos_s *attr =
             (FAR struct slcd_curpos_s *)((uintptr_t)arg);
 
@@ -937,7 +937,7 @@ static int st7032_ioctl(FAR struct file *filep, int cmd,
         {
           FAR struct inode *inode = filep->f_inode;
           FAR struct st7032_dev_s *priv =
-            (FAR struct st7032_dev_s *)inode->i_private;
+            inode->i_private;
 
           nxmutex_lock(&priv->lock);
           *(FAR int *)((uintptr_t)arg) = 1; /* Hardcoded */
@@ -949,7 +949,7 @@ static int st7032_ioctl(FAR struct file *filep, int cmd,
         {
           FAR struct inode *inode = filep->f_inode;
           FAR struct st7032_dev_s *priv =
-            (FAR struct st7032_dev_s *)inode->i_private;
+            inode->i_private;
 
           nxmutex_lock(&priv->lock);
 
diff --git a/drivers/lcd/tda19988.c b/drivers/lcd/tda19988.c
index bae4ae99835..4160ab9db47 100644
--- a/drivers/lcd/tda19988.c
+++ b/drivers/lcd/tda19988.c
@@ -825,7 +825,7 @@ static int tda19988_open(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the driver instance */
@@ -867,7 +867,7 @@ static int tda19988_close(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the driver */
@@ -923,7 +923,7 @@ static ssize_t tda19988_read(FAR struct file *filep, FAR char *buffer,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the driver */
@@ -992,7 +992,7 @@ static off_t tda19988_seek(FAR struct file *filep, off_t offset, int whence)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the driver */
@@ -1085,7 +1085,7 @@ static int tda19988_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the driver */
@@ -1163,7 +1163,7 @@ static int tda19988_poll(FAR struct file *filep, FAR struct pollfd *fds,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the driver */
@@ -1204,7 +1204,7 @@ static int tda19988_unlink(FAR struct inode *inode)
   /* Get the private driver state instance */
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct tda1988_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the driver */
 
diff --git a/drivers/leds/userled_upper.c b/drivers/leds/userled_upper.c
index d19b17103a9..27134158ec7 100644
--- a/drivers/leds/userled_upper.c
+++ b/drivers/leds/userled_upper.c
@@ -124,7 +124,7 @@ static int userled_open(FAR struct file *filep)
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct userled_upperhalf_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
@@ -180,7 +180,7 @@ static int userled_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct userled_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Handle an improbable race conditions with the following atomic test
    * and set.
@@ -263,7 +263,7 @@ static ssize_t userled_write(FAR struct file *filep, FAR const char *buffer,
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct userled_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Make sure that the buffer is sufficiently large to hold at least one
    * complete sample.
@@ -319,7 +319,7 @@ static int userled_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
               filep->f_inode != NULL);
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct userled_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
diff --git a/drivers/loop/losetup.c b/drivers/loop/losetup.c
index 4c89c635c75..1dd4a8ec2e4 100644
--- a/drivers/loop/losetup.c
+++ b/drivers/loop/losetup.c
@@ -111,7 +111,7 @@ static int loop_open(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct loop_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Make sure we have exclusive access to the state structure */
 
@@ -148,7 +148,7 @@ static int loop_close(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct loop_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Make sure we have exclusive access to the state structure */
 
@@ -188,7 +188,7 @@ static ssize_t loop_read(FAR struct inode *inode, FAR unsigned char *buffer,
   off_t ret;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct loop_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   if (start_sector + nsectors > dev->nsectors)
     {
@@ -242,7 +242,7 @@ static ssize_t loop_write(FAR struct inode *inode,
   off_t ret;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct loop_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Calculate the offset to write the sectors and seek to the position */
 
@@ -286,7 +286,7 @@ static int loop_geometry(FAR struct inode *inode,
 
   if (geometry)
     {
-      dev = (FAR struct loop_struct_s *)inode->i_private;
+      dev = inode->i_private;
 
       memset(geometry, 0, sizeof(*geometry));
 
@@ -447,7 +447,7 @@ int loteardown(FAR const char *devname)
 
   /* Inode private data is a reference to the loop device structure */
 
-  dev = (FAR struct loop_struct_s *)inode->i_private;
+  dev = inode->i_private;
   close_blockdriver(inode);
 
   DEBUGASSERT(dev != NULL);
diff --git a/drivers/misc/ramdisk.c b/drivers/misc/ramdisk.c
index 892ca8b76dd..ae1c69b5c04 100644
--- a/drivers/misc/ramdisk.c
+++ b/drivers/misc/ramdisk.c
@@ -168,7 +168,7 @@ static int rd_open(FAR struct inode *inode)
   FAR struct rd_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct rd_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Increment the open reference count */
 
@@ -193,7 +193,7 @@ static int rd_close(FAR struct inode *inode)
   FAR struct rd_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct rd_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Increment the open reference count */
 
@@ -234,7 +234,7 @@ static ssize_t rd_read(FAR struct inode *inode, unsigned char *buffer,
   FAR struct rd_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct rd_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   finfo("sector: %" PRIuOFF " nsectors: %u sectorsize: %d\n",
         start_sector, nsectors, dev->rd_sectsize);
@@ -268,7 +268,7 @@ static ssize_t rd_write(FAR struct inode *inode, const unsigned char *buffer,
   struct rd_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct rd_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   finfo("sector: %" PRIuOFF " nsectors: %u sectorsize: %d\n",
         start_sector, nsectors, dev->rd_sectsize);
@@ -308,7 +308,7 @@ static int rd_geometry(FAR struct inode *inode, struct geometry *geometry)
 
   if (geometry)
     {
-      dev = (struct rd_struct_s *)inode->i_private;
+      dev = inode->i_private;
 
       memset(geometry, 0, sizeof(*geometry));
 
@@ -349,7 +349,7 @@ static int rd_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
   DEBUGASSERT(inode->i_private);
   if (cmd == BIOC_XIPBASE && ppv)
     {
-      dev  = (FAR struct rd_struct_s *)inode->i_private;
+      dev  = inode->i_private;
       *ppv = (FAR void *)dev->rd_buffer;
 
       finfo("ppv: %p\n", *ppv);
@@ -373,7 +373,7 @@ static int rd_unlink(FAR struct inode *inode)
   FAR struct rd_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct rd_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Mark the pipe unlinked */
 
diff --git a/drivers/misc/rpmsgblk.c b/drivers/misc/rpmsgblk.c
index 7654f04206d..2fc3dee4c30 100644
--- a/drivers/misc/rpmsgblk.c
+++ b/drivers/misc/rpmsgblk.c
@@ -166,7 +166,7 @@ static const rpmsg_ept_cb g_rpmsgblk_handler[] =
 
 static int rpmsgblk_open(FAR struct inode *inode)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   struct rpmsgblk_open_s msg;
   int ret;
 
@@ -216,7 +216,7 @@ static int rpmsgblk_open(FAR struct inode *inode)
 
 static int rpmsgblk_close(FAR struct inode *inode)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   struct rpmsgblk_close_s msg;
   int ret;
 
@@ -266,7 +266,7 @@ static ssize_t rpmsgblk_read(FAR struct inode *inode,
                              FAR unsigned char *buffer,
                              blkcnt_t start_sector, unsigned int nsectors)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   struct rpmsgblk_read_s msg;
   struct iovec iov;
   int ret;
@@ -326,7 +326,7 @@ static ssize_t rpmsgblk_write(FAR struct inode *inode,
                               FAR const unsigned char *buffer,
                               blkcnt_t start_sector, unsigned int nsectors)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   FAR struct rpmsgblk_write_s *msg;
   struct rpmsgblk_cookie_s cookie;
   uint32_t sectorsize;
@@ -434,7 +434,7 @@ out:
 static int rpmsgblk_geometry(FAR struct inode *inode,
                              FAR struct geometry *geometry)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   struct rpmsgblk_geometry_s *msg;
   uint32_t space;
   int msglen;
@@ -577,7 +577,7 @@ static ssize_t rpmsgblk_ioctl_arglen(int cmd, unsigned long arg)
 static int rpmsgblk_ioctl(FAR struct inode *inode, int cmd,
                           unsigned long arg)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   FAR struct rpmsgblk_ioctl_s *msg;
   uint32_t space;
   ssize_t arglen;
@@ -676,7 +676,7 @@ static int rpmsgblk_ioctl(FAR struct inode *inode, int cmd,
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
 static int rpmsgblk_unlink(FAR struct inode *inode)
 {
-  FAR struct rpmsgblk_s *priv = (FAR struct rpmsgblk_s *)inode->i_private;
+  FAR struct rpmsgblk_s *priv = inode->i_private;
   struct rpmsgblk_unlink_s msg;
   int ret;
 
diff --git a/drivers/mmcsd/mmcsd_sdio.c b/drivers/mmcsd/mmcsd_sdio.c
index c1c2e14f173..a35536e8b3d 100644
--- a/drivers/mmcsd/mmcsd_sdio.c
+++ b/drivers/mmcsd/mmcsd_sdio.c
@@ -2044,7 +2044,7 @@ static int mmcsd_open(FAR struct inode *inode)
 
   finfo("Entry\n");
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct mmcsd_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Just increment the reference count on the driver */
 
@@ -2075,7 +2075,7 @@ static int mmcsd_close(FAR struct inode *inode)
 
   finfo("Entry\n");
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct mmcsd_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Decrement the reference count on the block driver */
 
@@ -2110,7 +2110,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
   ssize_t ret = nsectors;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct mmcsd_state_s *)inode->i_private;
+  priv = inode->i_private;
   finfo("startsector: %" PRIuOFF " nsectors: %u sectorsize: %d\n",
         startsector, nsectors, priv->blocksize);
 
@@ -2188,7 +2188,7 @@ static ssize_t mmcsd_write(FAR struct inode *inode,
   ssize_t ret = nsectors;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct mmcsd_state_s *)inode->i_private;
+  priv = inode->i_private;
   finfo("startsector: %" PRIuOFF " nsectors: %u sectorsize: %d\n",
         startsector, nsectors, priv->blocksize);
 
@@ -2267,7 +2267,7 @@ static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
 
       /* Is there a (supported) card inserted in the slot? */
 
-      priv = (FAR struct mmcsd_state_s *)inode->i_private;
+      priv = inode->i_private;
       ret = mmcsd_lock(priv);
       if (ret < 0)
         {
@@ -2322,7 +2322,7 @@ static int mmcsd_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
 
   finfo("Entry\n");
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct mmcsd_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Process the IOCTL by command */
 
diff --git a/drivers/mmcsd/mmcsd_spi.c b/drivers/mmcsd/mmcsd_spi.c
index 9ed7dcd73f7..fb911d5a639 100644
--- a/drivers/mmcsd/mmcsd_spi.c
+++ b/drivers/mmcsd/mmcsd_spi.c
@@ -1088,7 +1088,7 @@ static int mmcsd_open(FAR struct inode *inode)
 
   /* Extract our private data from the inode structure */
 
-  slot = (FAR struct mmcsd_slot_s *)inode->i_private;
+  slot = inode->i_private;
   spi  = slot->spi;
 
 #ifdef CONFIG_DEBUG_FEATURES
@@ -1188,7 +1188,7 @@ static ssize_t mmcsd_read(FAR struct inode *inode, unsigned char *buffer,
 
   /* Extract our private data from the inode structure */
 
-  slot = (FAR struct mmcsd_slot_s *)inode->i_private;
+  slot = inode->i_private;
   spi  = slot->spi;
 
 #ifdef CONFIG_DEBUG_FEATURES
@@ -1371,7 +1371,7 @@ static ssize_t mmcsd_write(FAR struct inode *inode,
 
   /* Extract our private data from the inode structure */
 
-  slot = (FAR struct mmcsd_slot_s *)inode->i_private;
+  slot = inode->i_private;
   spi  = slot->spi;
 
 #ifdef CONFIG_DEBUG_FEATURES
@@ -1575,7 +1575,7 @@ static int mmcsd_geometry(FAR struct inode *inode, struct geometry *geometry)
 
   /* Extract our private data from the inode structure */
 
-  slot = (FAR struct mmcsd_slot_s *)inode->i_private;
+  slot = inode->i_private;
   spi  = slot->spi;
 
 #ifdef CONFIG_DEBUG_FEATURES
diff --git a/drivers/modem/alt1250/alt1250.c b/drivers/modem/alt1250/alt1250.c
index 426ca985ece..63daca39c91 100644
--- a/drivers/modem/alt1250/alt1250.c
+++ b/drivers/modem/alt1250/alt1250.c
@@ -1129,7 +1129,7 @@ static int alt1250_open(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  dev = (FAR struct alt1250_dev_s *)inode->i_private;
+  dev = inode->i_private;
   DEBUGASSERT(dev);
 
   nxmutex_lock(&dev->refslock);
@@ -1175,7 +1175,7 @@ static int alt1250_close(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  dev = (FAR struct alt1250_dev_s *)inode->i_private;
+  dev = inode->i_private;
   DEBUGASSERT(dev);
 
   nxmutex_lock(&dev->refslock);
@@ -1220,7 +1220,7 @@ static ssize_t alt1250_read(FAR struct file *filep, FAR char *buffer,
 
   inode = filep->f_inode;
 
-  dev = (FAR struct alt1250_dev_s *)inode->i_private;
+  dev = inode->i_private;
   DEBUGASSERT(dev);
 
   if (len != sizeof(struct alt_readdata_s))
@@ -1245,7 +1245,7 @@ static int alt1250_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  dev = (FAR struct alt1250_dev_s *)inode->i_private;
+  dev = inode->i_private;
   DEBUGASSERT(dev);
 
   switch (cmd)
@@ -1309,7 +1309,7 @@ static int alt1250_poll(FAR struct file *filep, FAR struct pollfd *fds,
 
   inode = filep->f_inode;
 
-  dev = (FAR struct alt1250_dev_s *)inode->i_private;
+  dev = inode->i_private;
   DEBUGASSERT(dev);
 
   /* Are we setting up the poll?  Or tearing it down? */
diff --git a/drivers/mtd/dhara.c b/drivers/mtd/dhara.c
index 44bf896092d..dc81c1f6f09 100644
--- a/drivers/mtd/dhara.c
+++ b/drivers/mtd/dhara.c
@@ -297,7 +297,7 @@ static int dhara_open(FAR struct inode *inode)
   FAR dhara_dev_t *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR dhara_dev_t *) inode->i_private;
+  dev = inode->i_private;
   nxmutex_lock(&dev->lock);
   dev->refs++;
   nxmutex_unlock(&dev->lock);
@@ -317,7 +317,7 @@ static int dhara_close(FAR struct inode *inode)
   FAR dhara_dev_t *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR dhara_dev_t *) inode->i_private;
+  dev = inode->i_private;
   nxmutex_lock(&dev->lock);
   dev->refs--;
   nxmutex_unlock(&dev->lock);
@@ -350,7 +350,7 @@ static ssize_t dhara_read(FAR struct inode *inode,
   int ret = 0;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR dhara_dev_t *)inode->i_private;
+  dev = inode->i_private;
 
   nxmutex_lock(&dev->lock);
   while (nsectors-- > 0)
@@ -394,7 +394,7 @@ static ssize_t dhara_write(FAR struct inode *inode,
   int ret = 0;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR dhara_dev_t *)inode->i_private;
+  dev = inode->i_private;
 
   nxmutex_lock(&dev->lock);
   while (nsectors-- > 0)
@@ -434,7 +434,7 @@ static int dhara_geometry(FAR struct inode *inode,
   FAR dhara_dev_t *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR dhara_dev_t *)inode->i_private;
+  dev = inode->i_private;
 
   if (geometry)
     {
@@ -467,7 +467,7 @@ static int dhara_ioctl(FAR struct inode *inode,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  dev = (dhara_dev_t *)inode->i_private;
+  dev = inode->i_private;
 
   /* No other block driver ioctl commands are not recognized by this
    * driver.  Other possible MTD driver ioctl commands are passed through
@@ -496,7 +496,7 @@ static int dhara_unlink(FAR struct inode *inode)
   FAR dhara_dev_t *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR dhara_dev_t *)inode->i_private;
+  dev = inode->i_private;
   nxmutex_lock(&dev->lock);
   dev->unlinked = true;
   nxmutex_unlock(&dev->lock);
diff --git a/drivers/mtd/ftl.c b/drivers/mtd/ftl.c
index 60ccfd2bf39..1426398e0a5 100644
--- a/drivers/mtd/ftl.c
+++ b/drivers/mtd/ftl.c
@@ -213,7 +213,7 @@ static int ftl_open(FAR struct inode *inode)
   FAR struct ftl_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct ftl_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   dev->refs++;
   return OK;
@@ -231,7 +231,7 @@ static int ftl_close(FAR struct inode *inode)
   FAR struct ftl_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct ftl_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
 #ifdef CONFIG_FTL_WRITEBUFFER
   rwb_flush(&dev->rwb);
@@ -444,7 +444,7 @@ static ssize_t ftl_read(FAR struct inode *inode, unsigned char *buffer,
 
   DEBUGASSERT(inode->i_private);
 
-  dev = (FAR struct ftl_struct_s *)inode->i_private;
+  dev = inode->i_private;
 #ifdef FTL_HAVE_RWBUFFER
   return rwb_read(&dev->rwb, start_sector, nsectors, buffer);
 #else
@@ -661,7 +661,7 @@ static ssize_t ftl_write(FAR struct inode *inode,
   finfo("sector: %" PRIuOFF " nsectors: %u\n", start_sector, nsectors);
 
   DEBUGASSERT(inode->i_private);
-  dev = (struct ftl_struct_s *)inode->i_private;
+  dev = inode->i_private;
 #ifdef FTL_HAVE_RWBUFFER
   return rwb_write(&dev->rwb, start_sector, nsectors, buffer);
 #else
@@ -685,7 +685,7 @@ static int ftl_geometry(FAR struct inode *inode,
 
   if (geometry)
     {
-      dev = (struct ftl_struct_s *)inode->i_private;
+      dev = inode->i_private;
       geometry->geo_available     = true;
       geometry->geo_mediachanged  = false;
       geometry->geo_writeenabled  = true;
@@ -721,7 +721,7 @@ static int ftl_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
   finfo("Entry\n");
   DEBUGASSERT(inode->i_private);
 
-  dev = (struct ftl_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   if (cmd == BIOC_FLUSH)
     {
@@ -757,7 +757,7 @@ static int ftl_unlink(FAR struct inode *inode)
   FAR struct ftl_struct_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct ftl_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   dev->unlinked = true;
   if (dev->refs == 0)
diff --git a/drivers/mtd/mtd_config.c b/drivers/mtd/mtd_config.c
index fe20a0c323a..a98faca052c 100644
--- a/drivers/mtd/mtd_config.c
+++ b/drivers/mtd/mtd_config.c
@@ -1809,7 +1809,7 @@ int mtdconfig_unregister(void)
     }
 
   inode = file.f_inode;
-  dev = (FAR struct mtdconfig_struct_s *)inode->i_private;
+  dev = inode->i_private;
   nxmutex_destroy(&dev->lock);
   kmm_free(dev);
 
diff --git a/drivers/mtd/mtd_config_fs.c b/drivers/mtd/mtd_config_fs.c
index 2d7c4060650..2ba76ae65da 100644
--- a/drivers/mtd/mtd_config_fs.c
+++ b/drivers/mtd/mtd_config_fs.c
@@ -1916,7 +1916,7 @@ static int mtdconfig_ioctl(FAR struct file *filep, int cmd,
                            unsigned long arg)
 {
   FAR struct inode *inode = filep->f_inode;
-  FAR struct nvs_fs *fs = (FAR struct nvs_fs *)inode->i_private;
+  FAR struct nvs_fs *fs = inode->i_private;
   FAR struct config_data_s *pdata = (FAR struct config_data_s *)arg;
   int ret = -ENOTTY;
 
@@ -2089,7 +2089,7 @@ int mtdconfig_unregister_by_path(FAR const char *path)
     }
 
   inode = file.f_inode;
-  fs = (FAR struct nvs_fs *)inode->i_private;
+  fs = inode->i_private;
   nxmutex_destroy(&fs->nvs_lock);
   kmm_free(fs);
   file_close(&file);
diff --git a/drivers/mtd/smart.c b/drivers/mtd/smart.c
index cc1640d2e71..4fa992e4194 100644
--- a/drivers/mtd/smart.c
+++ b/drivers/mtd/smart.c
@@ -907,7 +907,7 @@ static ssize_t smart_read(FAR struct inode *inode, unsigned char *buffer,
 #ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
   dev = ((FAR struct smart_multiroot_device_s *)inode->i_private)->dev;
 #else
-  dev = (struct smart_struct_s *)inode->i_private;
+  dev = inode->i_private;
 #endif
   return smart_reload(dev, buffer, start_sector, nsectors);
 }
@@ -943,7 +943,7 @@ static ssize_t smart_write(FAR struct inode *inode,
 #ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
   dev = ((FAR struct smart_multiroot_device_s *)inode->i_private)->dev;
 #else
-  dev = (FAR struct smart_struct_s *)inode->i_private;
+  dev = inode->i_private;
 #endif
 
   /* I think maybe we need to lock on a mutex here */
@@ -1054,7 +1054,7 @@ static int smart_geometry(FAR struct inode *inode, struct geometry *geometry)
 #ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
       dev = ((FAR struct smart_multiroot_device_s *)inode->i_private)->dev;
 #else
-      dev = (FAR struct smart_struct_s *)inode->i_private;
+      dev = inode->i_private;
 #endif
       geometry->geo_available     = true;
       geometry->geo_mediachanged  = false;
@@ -5487,7 +5487,7 @@ static int smart_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
 #ifdef CONFIG_SMARTFS_MULTI_ROOT_DIRS
   dev = ((FAR struct smart_multiroot_device_s *)inode->i_private)->dev;
 #else
-  dev = (FAR struct smart_struct_s *)inode->i_private;
+  dev = inode->i_private;
 #endif
 
   /* Process the ioctl's we care about first, pass any we don't respond
@@ -6433,7 +6433,7 @@ static int smart_loteardown(FAR const char *devname)
 
   /* Inode private data is a reference to the loop device structure */
 
-  dev = (FAR struct smart_struct_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Validate this is a filemtd backended device */
 
diff --git a/drivers/note/noteram_driver.c b/drivers/note/noteram_driver.c
index 84b493f2d61..ed0177eff7a 100644
--- a/drivers/note/noteram_driver.c
+++ b/drivers/note/noteram_driver.c
@@ -469,8 +469,7 @@ static ssize_t noteram_read(FAR struct file *filep, FAR char *buffer,
 static int noteram_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 {
   int ret = -ENOSYS;
-  FAR struct noteram_driver_s *drv =
-    (FAR struct noteram_driver_s *)filep->f_inode->i_private;
+  FAR struct noteram_driver_s *drv = filep->f_inode->i_private;
   irqstate_t flags = spin_lock_irqsave_wo_note(&drv->lock);
 
   /* Handle the ioctl commands */
diff --git a/drivers/pipes/pipe_common.c b/drivers/pipes/pipe_common.c
index 5abad5c94eb..431b32757fe 100644
--- a/drivers/pipes/pipe_common.c
+++ b/drivers/pipes/pipe_common.c
@@ -888,7 +888,7 @@ int pipecommon_unlink(FAR struct inode *inode)
   FAR struct pipe_dev_s *dev;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct pipe_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Mark the pipe unlinked */
 
diff --git a/drivers/sensors/adxl345_base.c b/drivers/sensors/adxl345_base.c
index ac095fb7fbc..c841f904981 100644
--- a/drivers/sensors/adxl345_base.c
+++ b/drivers/sensors/adxl345_base.c
@@ -85,7 +85,7 @@ static ssize_t adxl345_read(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct adxl345_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the accelerometer data.
diff --git a/drivers/sensors/aht10.c b/drivers/sensors/aht10.c
index 52cd42727b4..510096901b6 100644
--- a/drivers/sensors/aht10.c
+++ b/drivers/sensors/aht10.c
@@ -535,7 +535,7 @@ static int aht10_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct aht10_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/apds9922.c b/drivers/sensors/apds9922.c
index d0213a4f3c4..d2ace5724b4 100644
--- a/drivers/sensors/apds9922.c
+++ b/drivers/sensors/apds9922.c
@@ -2185,7 +2185,7 @@ static int apds9922_als_poll(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct apds9922_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
@@ -2410,7 +2410,7 @@ static int apds9922_ps_poll(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct apds9922_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/drivers/sensors/apds9960.c b/drivers/sensors/apds9960.c
index 83b83a4d6d5..bad89b82fe9 100644
--- a/drivers/sensors/apds9960.c
+++ b/drivers/sensors/apds9960.c
@@ -1137,7 +1137,7 @@ static ssize_t apds9960_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct apds9960_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Check if the user is reading the right size */
 
diff --git a/drivers/sensors/bh1750fvi.c b/drivers/sensors/bh1750fvi.c
index 5e4a7eff484..a4c67a67d06 100644
--- a/drivers/sensors/bh1750fvi.c
+++ b/drivers/sensors/bh1750fvi.c
@@ -180,7 +180,7 @@ static ssize_t bh1750fvi_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct bh1750fvi_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Check if the user is reading the right size */
 
diff --git a/drivers/sensors/hc_sr04.c b/drivers/sensors/hc_sr04.c
index 0fb5454d5da..117ef874912 100644
--- a/drivers/sensors/hc_sr04.c
+++ b/drivers/sensors/hc_sr04.c
@@ -284,7 +284,7 @@ static int hcsr04_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct hcsr04_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/hdc1008.c b/drivers/sensors/hdc1008.c
index 199393807ef..e77c75858eb 100644
--- a/drivers/sensors/hdc1008.c
+++ b/drivers/sensors/hdc1008.c
@@ -517,8 +517,7 @@ static int hdc1008_putreg(FAR struct hdc1008_dev_s *priv, uint8_t regaddr,
 static int hdc1008_open(FAR struct file *filep)
 {
   FAR struct inode *inode        = filep->f_inode;
-  FAR struct hdc1008_dev_s *priv =
-    (FAR struct hdc1008_dev_s *)inode->i_private;
+  FAR struct hdc1008_dev_s *priv = inode->i_private;
   int ret;
 
   ret = nxmutex_lock(&priv->devlock);
@@ -549,8 +548,7 @@ static int hdc1008_open(FAR struct file *filep)
 static int hdc1008_close(FAR struct file *filep)
 {
   FAR struct inode *inode        = filep->f_inode;
-  FAR struct hdc1008_dev_s *priv =
-    (FAR struct hdc1008_dev_s *)inode->i_private;
+  FAR struct hdc1008_dev_s *priv = inode->i_private;
   int ret;
 
   ret = nxmutex_lock(&priv->devlock);
@@ -592,8 +590,7 @@ static ssize_t hdc1008_read(FAR struct file *filep, FAR char *buffer,
                             size_t buflen)
 {
   FAR struct inode *inode        = filep->f_inode;
-  FAR struct hdc1008_dev_s *priv =
-    (FAR struct hdc1008_dev_s *)inode->i_private;
+  FAR struct hdc1008_dev_s *priv = inode->i_private;
   int ret;
   int len = 0;
   struct hdc1008_conv_data_s data;
@@ -738,8 +735,7 @@ static ssize_t hdc1008_write(FAR struct file *filep, FAR const char *buffer,
 static int hdc1008_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 {
   FAR struct inode *inode        = filep->f_inode;
-  FAR struct hdc1008_dev_s *priv =
-    (FAR struct hdc1008_dev_s *)inode->i_private;
+  FAR struct hdc1008_dev_s *priv = inode->i_private;
   int ret;
 
   /* Get exclusive access */
@@ -847,7 +843,7 @@ static int hdc1008_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT((inode != NULL) && (inode->i_private != NULL));
-  priv = (FAR struct hdc1008_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/drivers/sensors/hts221.c b/drivers/sensors/hts221.c
index 3e820ef25fd..5a5875c5d92 100644
--- a/drivers/sensors/hts221.c
+++ b/drivers/sensors/hts221.c
@@ -1067,7 +1067,7 @@ static int hts221_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct hts221_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/kxtj9.c b/drivers/sensors/kxtj9.c
index 3dcc4482a76..524c7cfe377 100644
--- a/drivers/sensors/kxtj9.c
+++ b/drivers/sensors/kxtj9.c
@@ -483,7 +483,7 @@ static ssize_t kxtj9_read(FAR struct file *filep, FAR char *buffer,
   DEBUGASSERT(buffer != NULL);
   inode = filep->f_inode;
 
-  priv = (FAR struct kxtj9_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL  && priv->i2c != NULL);
 
   /* Return all of the samples that will fit in the user-provided buffer */
@@ -540,7 +540,7 @@ static int kxtj9_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct kxtj9_dev_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv != NULL && priv->i2c != NULL);
 
   /* Handle ioctl commands */
diff --git a/drivers/sensors/lis2dh.c b/drivers/sensors/lis2dh.c
index dae41293223..786c915e44a 100644
--- a/drivers/sensors/lis2dh.c
+++ b/drivers/sensors/lis2dh.c
@@ -541,7 +541,7 @@ static int lis2dh_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct lis2dh_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&dev->devlock);
   if (ret < 0)
@@ -668,7 +668,7 @@ static int lis2dh_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct lis2dh_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&dev->devlock);
   if (ret < 0)
diff --git a/drivers/sensors/lsm303agr.c b/drivers/sensors/lsm303agr.c
index 672daeb9e03..1d23545c63d 100644
--- a/drivers/sensors/lsm303agr.c
+++ b/drivers/sensors/lsm303agr.c
@@ -956,7 +956,7 @@ static ssize_t lsm303agr_read(FAR struct file *filep,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct lsm303agr_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
   DEBUGASSERT(priv->datareg == LSM303AGR_OUTX_L_A_SHIFT ||
@@ -1077,7 +1077,7 @@ static int lsm303agr_ioctl(FAR struct file *filep, int cmd,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct lsm303agr_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
 
diff --git a/drivers/sensors/lsm6dsl.c b/drivers/sensors/lsm6dsl.c
index 12383fa5dde..6aaacbe0d9d 100644
--- a/drivers/sensors/lsm6dsl.c
+++ b/drivers/sensors/lsm6dsl.c
@@ -979,7 +979,7 @@ static ssize_t lsm6dsl_read(FAR struct file *filep,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct lsm6dsl_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
   DEBUGASSERT(priv->datareg == LSM6DSL_OUTX_L_G_SHIFT ||
@@ -1099,7 +1099,7 @@ static int lsm6dsl_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct lsm6dsl_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
 
diff --git a/drivers/sensors/lsm9ds1.c b/drivers/sensors/lsm9ds1.c
index bd42ed57cf8..81dc0cef9f8 100644
--- a/drivers/sensors/lsm9ds1.c
+++ b/drivers/sensors/lsm9ds1.c
@@ -1218,7 +1218,7 @@ static ssize_t lsm9ds1_read(FAR struct file *filep, FAR char *buffer,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct lsm9ds1_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
   DEBUGASSERT(priv->datareg == LSM9DS1_OUT_X_L_G ||
@@ -1339,7 +1339,7 @@ static int lsm9ds1_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct lsm9ds1_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
 
diff --git a/drivers/sensors/max44009.c b/drivers/sensors/max44009.c
index 9df217e26a6..d562f133813 100644
--- a/drivers/sensors/max44009.c
+++ b/drivers/sensors/max44009.c
@@ -218,7 +218,7 @@ static int max44009_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct max44009_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->dev_lock);
   if (ret < 0)
@@ -266,7 +266,7 @@ static int max44009_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct max44009_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->dev_lock);
   if (ret < 0)
@@ -308,7 +308,7 @@ static ssize_t max44009_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct max44009_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->dev_lock);
   if (ret < 0)
@@ -711,7 +711,7 @@ static int max44009_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct max44009_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->dev_lock);
   if (ret < 0)
@@ -783,7 +783,7 @@ static int max44009_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct max44009_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->dev_lock);
   if (ret < 0)
diff --git a/drivers/sensors/mlx90614.c b/drivers/sensors/mlx90614.c
index bdb6c98de3b..cec416db974 100644
--- a/drivers/sensors/mlx90614.c
+++ b/drivers/sensors/mlx90614.c
@@ -263,7 +263,7 @@ static ssize_t mlx90614_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct mlx90614_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Check if the user is reading the right size */
 
diff --git a/drivers/sensors/msa301.c b/drivers/sensors/msa301.c
index 6872b5a2964..a3060fba05e 100644
--- a/drivers/sensors/msa301.c
+++ b/drivers/sensors/msa301.c
@@ -481,7 +481,7 @@ static int msa301_open(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct msa301_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
 
@@ -507,7 +507,7 @@ static int msa301_close(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct msa301_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
 
@@ -537,7 +537,7 @@ static ssize_t msa301_read(FAR struct file *filep,
 
   inode = filep->f_inode;
 
-  priv = (FAR struct msa301_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
   DEBUGASSERT(buffer != NULL);
@@ -589,7 +589,7 @@ static int msa301_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct msa301_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv != NULL);
 
diff --git a/drivers/sensors/scd30.c b/drivers/sensors/scd30.c
index 05114a5705f..189ceca5ade 100644
--- a/drivers/sensors/scd30.c
+++ b/drivers/sensors/scd30.c
@@ -983,7 +983,7 @@ static int scd30_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct scd30_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/scd41.c b/drivers/sensors/scd41.c
index c781661ae9f..3d5041dbe86 100644
--- a/drivers/sensors/scd41.c
+++ b/drivers/sensors/scd41.c
@@ -940,7 +940,7 @@ static int scd41_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct scd41_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/sgp30.c b/drivers/sensors/sgp30.c
index 48323cbf672..6d9d5033685 100644
--- a/drivers/sensors/sgp30.c
+++ b/drivers/sensors/sgp30.c
@@ -990,7 +990,7 @@ static int sgp30_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct sgp30_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/sht21.c b/drivers/sensors/sht21.c
index 2bc85d1a0de..2a9e94eaed5 100644
--- a/drivers/sensors/sht21.c
+++ b/drivers/sensors/sht21.c
@@ -592,7 +592,7 @@ static int sht21_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct sht21_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/sht3x.c b/drivers/sensors/sht3x.c
index 74c7cbdc3f3..8ca651dc501 100644
--- a/drivers/sensors/sht3x.c
+++ b/drivers/sensors/sht3x.c
@@ -611,7 +611,7 @@ static int sht3x_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct sht3x_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/sps30.c b/drivers/sensors/sps30.c
index b205f2fb2a3..275ced2566b 100644
--- a/drivers/sensors/sps30.c
+++ b/drivers/sensors/sps30.c
@@ -1001,7 +1001,7 @@ static int sps30_unlink(FAR struct inode *inode)
   int ret;
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct sps30_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access */
 
diff --git a/drivers/sensors/veml6070.c b/drivers/sensors/veml6070.c
index 33d4f1983ff..3a16009bdbd 100644
--- a/drivers/sensors/veml6070.c
+++ b/drivers/sensors/veml6070.c
@@ -178,7 +178,7 @@ static ssize_t veml6070_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct veml6070_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Check if the user is reading the right size */
 
diff --git a/drivers/sensors/xen1210.c b/drivers/sensors/xen1210.c
index 88d4b0a5261..d8d1fb74352 100644
--- a/drivers/sensors/xen1210.c
+++ b/drivers/sensors/xen1210.c
@@ -104,7 +104,7 @@ static ssize_t xen1210_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct xen1210_dev_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Verify that the caller has provided a buffer large enough to receive
    * the magnetometer data.
diff --git a/drivers/sensors/zerocross.c b/drivers/sensors/zerocross.c
index c0f56b585cb..5d1e4b9a4be 100644
--- a/drivers/sensors/zerocross.c
+++ b/drivers/sensors/zerocross.c
@@ -202,7 +202,7 @@ static int zc_open(FAR struct file *filep)
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct zc_upperhalf_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
@@ -261,7 +261,7 @@ static int zc_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct zc_upperhalf_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Handle an improbable race conditions with the following atomic test
    * and set.
@@ -389,7 +389,7 @@ static int zc_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct zc_upperhalf_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the device structures */
 
diff --git a/drivers/spi/spi_driver.c b/drivers/spi/spi_driver.c
index b2c04dea9bd..3f32857567d 100644
--- a/drivers/spi/spi_driver.c
+++ b/drivers/spi/spi_driver.c
@@ -126,7 +126,7 @@ static int spidrvr_open(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct spi_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Get exclusive access to the SPI driver state structure */
@@ -162,7 +162,7 @@ static int spidrvr_close(FAR struct file *filep)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct spi_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Get exclusive access to the SPI driver state structure */
@@ -231,7 +231,7 @@ static int spidrvr_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct spi_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Get exclusive access to the SPI driver state structure */
@@ -291,7 +291,7 @@ static int spidrvr_unlink(FAR struct inode *inode)
   /* Get our private data structure */
 
   DEBUGASSERT(inode->i_private != NULL);
-  priv = (FAR struct spi_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the SPI driver state structure */
 
diff --git a/drivers/spi/spi_slave_driver.c b/drivers/spi/spi_slave_driver.c
index 5354cccf086..880027f1793 100644
--- a/drivers/spi/spi_slave_driver.c
+++ b/drivers/spi/spi_slave_driver.c
@@ -182,7 +182,7 @@ static int spi_slave_open(FAR struct file *filep)
   /* Get our private data structure */
 
   inode = filep->f_inode;
-  priv = (FAR struct spi_slave_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the SPI Slave driver state structure */
 
@@ -230,7 +230,7 @@ static int spi_slave_close(FAR struct file *filep)
   /* Get our private data structure */
 
   inode = filep->f_inode;
-  priv = (FAR struct spi_slave_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the SPI Slave driver state structure */
 
@@ -298,7 +298,7 @@ static ssize_t spi_slave_read(FAR struct file *filep, FAR char *buffer,
   /* Get our private data structure */
 
   inode = filep->f_inode;
-  priv  = (FAR struct spi_slave_driver_s *)inode->i_private;
+  priv  = inode->i_private;
 
   if (buffer == NULL)
     {
@@ -389,7 +389,7 @@ static ssize_t spi_slave_write(FAR struct file *filep,
   /* Get our private data structure */
 
   inode = filep->f_inode;
-  priv = (FAR struct spi_slave_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->lock);
   if (ret < 0)
@@ -444,7 +444,7 @@ static int spi_slave_poll(FAR struct file *filep, FAR struct pollfd *fds,
   /* Get our private data structure */
 
   inode = filep->f_inode;
-  priv = (FAR struct spi_slave_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->lock);
   if (ret < 0)
@@ -514,7 +514,7 @@ static int spi_slave_unlink(FAR struct inode *inode)
 
   /* Get our private data structure */
 
-  priv = (FAR struct spi_slave_driver_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the SPI Slave driver state structure */
 
diff --git a/drivers/syslog/ramlog.c b/drivers/syslog/ramlog.c
index beaefb5ea57..8fbf938deaf 100644
--- a/drivers/syslog/ramlog.c
+++ b/drivers/syslog/ramlog.c
@@ -461,7 +461,7 @@ static ssize_t ramlog_file_read(FAR struct file *filep, FAR char *buffer,
   /* Some sanity checking */
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct ramlog_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* If the circular buffer is empty, then wait for something to be written
    * to it.  This function may NOT be called from an interrupt handler.
@@ -623,7 +623,7 @@ static ssize_t ramlog_file_write(FAR struct file *filep,
   /* Some sanity checking */
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct ramlog_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   return ramlog_addbuf(priv, buffer, len);
 }
@@ -640,7 +640,7 @@ static int ramlog_file_ioctl(FAR struct file *filep, int cmd,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct ramlog_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->rl_lock);
   if (ret < 0)
@@ -680,7 +680,7 @@ static int ramlog_file_poll(FAR struct file *filep, FAR struct pollfd *fds,
   /* Some sanity checking */
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct ramlog_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Get exclusive access to the poll structures */
 
diff --git a/drivers/syslog/syslog_rpmsg.c b/drivers/syslog/syslog_rpmsg.c
index bb9f66486fc..49873263e05 100644
--- a/drivers/syslog/syslog_rpmsg.c
+++ b/drivers/syslog/syslog_rpmsg.c
@@ -305,7 +305,7 @@ static ssize_t syslog_rpmsg_file_read(FAR struct file *filep,
   /* Some sanity checking */
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct syslog_rpmsg_s *)inode->i_private;
+  priv = inode->i_private;
 
   flags = enter_critical_section();
   if (!priv->suspend && is_rpmsg_ept_ready(&priv->ept))
diff --git a/drivers/timers/oneshot.c b/drivers/timers/oneshot.c
index 9ee91658bc6..f51abbdb702 100644
--- a/drivers/timers/oneshot.c
+++ b/drivers/timers/oneshot.c
@@ -157,7 +157,7 @@ static int oneshot_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   tmrinfo("cmd=%d arg=%08lx\n", cmd, (unsigned long)arg);
 
   inode = filep->f_inode;
-  priv  = (FAR struct oneshot_dev_s *)inode->i_private;
+  priv  = inode->i_private;
   DEBUGASSERT(priv != NULL);
 
   /* Get exclusive access to the device structures */
diff --git a/drivers/usbhost/usbhost_cdcacm.c b/drivers/usbhost/usbhost_cdcacm.c
index 3bdfaead405..2abb630833d 100644
--- a/drivers/usbhost/usbhost_cdcacm.c
+++ b/drivers/usbhost/usbhost_cdcacm.c
@@ -2363,7 +2363,7 @@ static int usbhost_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  uartdev = (FAR struct uart_dev_s *)inode->i_private;
+  uartdev = inode->i_private;
 
   DEBUGASSERT(uartdev && uartdev->priv);
   priv = (FAR struct usbhost_cdcacm_s *)uartdev->priv;
diff --git a/drivers/usbhost/usbhost_ft232r.c b/drivers/usbhost/usbhost_ft232r.c
index d9ca8d3fc5c..89c78aca1e4 100644
--- a/drivers/usbhost/usbhost_ft232r.c
+++ b/drivers/usbhost/usbhost_ft232r.c
@@ -2309,7 +2309,7 @@ static int usbhost_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  uartdev = (FAR struct uart_dev_s *)inode->i_private;
+  uartdev = inode->i_private;
 
   DEBUGASSERT(uartdev && uartdev->priv);
   priv = (FAR struct usbhost_ft232r_s *)uartdev->priv;
diff --git a/drivers/usbhost/usbhost_storage.c b/drivers/usbhost/usbhost_storage.c
index 9df7fa79394..db62e18aaac 100644
--- a/drivers/usbhost/usbhost_storage.c
+++ b/drivers/usbhost/usbhost_storage.c
@@ -1876,7 +1876,7 @@ static int usbhost_open(FAR struct inode *inode)
 
   uinfo("Entry\n");
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct usbhost_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Make sure that we have exclusive access to the private data structure */
 
@@ -1930,7 +1930,7 @@ static int usbhost_close(FAR struct inode *inode)
 
   uinfo("Entry\n");
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct usbhost_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Decrement the reference count on the block driver */
 
@@ -1988,7 +1988,7 @@ static ssize_t usbhost_read(FAR struct inode *inode, unsigned char *buffer,
   int ret;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct usbhost_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv->usbclass.hport);
   hport = priv->usbclass.hport;
@@ -2103,7 +2103,7 @@ static ssize_t usbhost_write(FAR struct inode *inode,
   uinfo("sector: %" PRIuOFF " nsectors: %u\n", startsector, nsectors);
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct usbhost_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   DEBUGASSERT(priv->usbclass.hport);
   hport = priv->usbclass.hport;
@@ -2203,7 +2203,7 @@ static int usbhost_geometry(FAR struct inode *inode,
 
   /* Check if the mass storage device is still connected */
 
-  priv = (FAR struct usbhost_state_s *)inode->i_private;
+  priv = inode->i_private;
   if (priv->disconnected)
     {
       /* No... the block driver is no longer bound to the class.  That means
@@ -2251,7 +2251,7 @@ static int usbhost_ioctl(FAR struct inode *inode, int cmd, unsigned long arg)
 
   uinfo("Entry\n");
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct usbhost_state_s *)inode->i_private;
+  priv = inode->i_private;
 
   /* Check if the mass storage device is still connected */
 
diff --git a/drivers/usbmisc/fusb301.c b/drivers/usbmisc/fusb301.c
index 170154b9332..d41107b085a 100644
--- a/drivers/usbmisc/fusb301.c
+++ b/drivers/usbmisc/fusb301.c
@@ -659,7 +659,7 @@ static int fusb301_poll(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct fusb301_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/drivers/usbmisc/fusb302.c b/drivers/usbmisc/fusb302.c
index 31fcbf1e2eb..9ae45f7b8e7 100644
--- a/drivers/usbmisc/fusb302.c
+++ b/drivers/usbmisc/fusb302.c
@@ -1762,7 +1762,7 @@ static int fusb302_poll(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct fusb302_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/drivers/usbmisc/fusb303.c b/drivers/usbmisc/fusb303.c
index 547eee090a6..b7ad5490589 100644
--- a/drivers/usbmisc/fusb303.c
+++ b/drivers/usbmisc/fusb303.c
@@ -847,7 +847,7 @@ static int fusb303_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct fusb303_dev_s *)inode->i_private;
+  priv = inode->i_private;
 
   ret = nxmutex_lock(&priv->devlock);
   if (ret < 0)
diff --git a/drivers/video/fb.c b/drivers/video/fb.c
index 9bd6ddf9df3..c8b6afd6cc1 100644
--- a/drivers/video/fb.c
+++ b/drivers/video/fb.c
@@ -217,7 +217,7 @@ static ssize_t fb_read(FAR struct file *filep, FAR char *buffer, size_t len)
   /* Get the framebuffer instance */
 
   inode = filep->f_inode;
-  fb    = (FAR struct fb_chardev_s *)inode->i_private;
+  fb    = inode->i_private;
 
   /* Get panel info */
 
@@ -271,7 +271,7 @@ static ssize_t fb_write(FAR struct file *filep, FAR const char *buffer,
   /* Get the framebuffer instance */
 
   inode = filep->f_inode;
-  fb    = (FAR struct fb_chardev_s *)inode->i_private;
+  fb    = inode->i_private;
 
   /* Get panel info */
 
@@ -330,7 +330,7 @@ static off_t fb_seek(FAR struct file *filep, off_t offset, int whence)
   /* Get the framebuffer instance */
 
   inode = filep->f_inode;
-  fb    = (FAR struct fb_chardev_s *)inode->i_private;
+  fb    = inode->i_private;
 
   /* Determine the new, requested file position */
 
@@ -409,7 +409,7 @@ static int fb_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   /* Get the framebuffer instance */
 
   inode = filep->f_inode;
-  fb    = (FAR struct fb_chardev_s *)inode->i_private;
+  fb    = inode->i_private;
 
   /* Process the IOCTL command */
 
@@ -857,7 +857,7 @@ static int fb_mmap(FAR struct file *filep, FAR struct mm_map_entry_s *map)
   /* Get the framebuffer instance */
 
   inode = filep->f_inode;
-  fb    = (FAR struct fb_chardev_s *)inode->i_private;
+  fb    = inode->i_private;
 
   /* Get panel info */
 
@@ -896,7 +896,7 @@ static int fb_poll(FAR struct file *filep, struct pollfd *fds, bool setup)
   /* Get the framebuffer instance */
 
   inode = filep->f_inode;
-  fb    = (FAR struct fb_chardev_s *)inode->i_private;
+  fb    = inode->i_private;
 
   if (setup)
     {
diff --git a/drivers/video/mipidsi/mipi_dsi_device_driver.c b/drivers/video/mipidsi/mipi_dsi_device_driver.c
index 4b319ec90eb..7c066fafd22 100644
--- a/drivers/video/mipidsi/mipi_dsi_device_driver.c
+++ b/drivers/video/mipidsi/mipi_dsi_device_driver.c
@@ -113,7 +113,7 @@ static int dsi_dev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   inode = filep->f_inode;
 
-  priv = (FAR struct mipi_dsi_device_driver_s *)inode->i_private;
+  priv = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Get exclusive access to the DSI device driver state structure */
diff --git a/drivers/video/video.c b/drivers/video/video.c
index dfb00ae54e8..10c925d6227 100644
--- a/drivers/video/video.c
+++ b/drivers/video/video.c
@@ -1046,7 +1046,7 @@ get_connected_imgsensor(FAR struct imgsensor_s **sensors,
 static int video_open(FAR struct file *filep)
 {
   FAR struct inode *inode = filep->f_inode;
-  FAR video_mng_t  *priv  = (FAR video_mng_t *)inode->i_private;
+  FAR video_mng_t  *priv  = inode->i_private;
   int ret = OK;
 
   nxmutex_lock(&priv->lock_open_num);
@@ -1083,7 +1083,7 @@ static int video_open(FAR struct file *filep)
 static int video_close(FAR struct file *filep)
 {
   FAR struct inode *inode = filep->f_inode;
-  FAR video_mng_t  *priv  = (FAR video_mng_t *)inode->i_private;
+  FAR video_mng_t  *priv  = inode->i_private;
 
   nxmutex_lock(&priv->lock_open_num);
 
@@ -1125,7 +1125,7 @@ static ssize_t video_write(FAR struct file *filep,
 #ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
 static int video_unlink(FAR struct inode *inode)
 {
-  FAR video_mng_t *priv = (FAR video_mng_t *)inode->i_private;
+  FAR video_mng_t *priv = inode->i_private;
   nxmutex_lock(&priv->lock_open_num);
   if (priv->open_num == 0)
     {
@@ -3080,7 +3080,7 @@ static int video_s_ext_ctrls_scene(FAR struct video_mng_s *vmng,
 static int video_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 {
   FAR struct inode *inode = filep->f_inode;
-  FAR video_mng_t  *priv  = (FAR video_mng_t *)inode->i_private;
+  FAR video_mng_t  *priv  = inode->i_private;
   int ret = OK;
 
   switch (cmd)
@@ -3236,7 +3236,7 @@ static int video_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 static int video_mmap(FAR struct file *filep, FAR struct mm_map_entry_s *map)
 {
   FAR struct inode     *inode    = filep->f_inode;
-  FAR video_mng_t      *priv     = (FAR video_mng_t *)inode->i_private;
+  FAR video_mng_t      *priv     = inode->i_private;
   FAR video_type_inf_t *type_inf = &priv->video_inf;
   size_t                heapsize = get_heapsize(type_inf);
   int                   ret      = -EINVAL;
@@ -3254,7 +3254,7 @@ static int video_mmap(FAR struct file *filep, FAR struct mm_map_entry_s *map)
 static int video_poll(FAR struct file *filep, struct pollfd *fds, bool setup)
 {
   FAR struct inode     *inode = filep->f_inode;
-  FAR video_mng_t      *priv  = (FAR video_mng_t *)inode->i_private;
+  FAR video_mng_t      *priv  = inode->i_private;
   FAR video_type_inf_t *type_inf;
   enum v4l2_buf_type   buf_type;
   irqstate_t           flags;
diff --git a/drivers/virtio/virtio-blk.c b/drivers/virtio/virtio-blk.c
index e5dd9aa0a9e..3873234a0e7 100644
--- a/drivers/virtio/virtio-blk.c
+++ b/drivers/virtio/virtio-blk.c
@@ -287,7 +287,7 @@ static ssize_t virtio_blk_read(FAR struct inode *inode,
   FAR struct virtio_blk_priv_s *priv;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct virtio_blk_priv_s *)inode->i_private;
+  priv = inode->i_private;
   return virtio_blk_rdwr(priv, buffer, startsector, nsectors, false);
 }
 
@@ -307,7 +307,7 @@ static ssize_t virtio_blk_write(FAR struct inode *inode,
   FAR struct virtio_blk_priv_s *priv;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct virtio_blk_priv_s *)inode->i_private;
+  priv = inode->i_private;
   return virtio_blk_rdwr(priv, (FAR void *)buffer, startsector, nsectors,
                          true);
 }
@@ -326,7 +326,7 @@ static int virtio_blk_geometry(FAR struct inode *inode,
   int ret = -EINVAL;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct virtio_blk_priv_s *)inode->i_private;
+  priv = inode->i_private;
 
   if (geometry)
     {
@@ -405,7 +405,7 @@ static int virtio_blk_ioctl(FAR struct inode *inode, int cmd,
   int ret = -ENOTTY;
 
   DEBUGASSERT(inode->i_private);
-  priv = (FAR struct virtio_blk_priv_s *)inode->i_private;
+  priv = inode->i_private;
 
   switch (cmd)
     {
diff --git a/drivers/wireless/cc1101.c b/drivers/wireless/cc1101.c
index 30576d1b251..73d0f8b4844 100644
--- a/drivers/wireless/cc1101.c
+++ b/drivers/wireless/cc1101.c
@@ -333,7 +333,7 @@ static int cc1101_file_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct cc1101_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -380,7 +380,7 @@ static int cc1101_file_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct cc1101_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -421,7 +421,7 @@ static ssize_t cc1101_file_write(FAR struct file *filep,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct cc1101_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -532,7 +532,7 @@ static ssize_t cc1101_file_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct cc1101_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = nxmutex_lock(&dev->devlock);
   if (ret < 0)
@@ -581,7 +581,7 @@ static int cc1101_file_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct cc1101_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Exclusive access */
 
diff --git a/drivers/wireless/gs2200m.c b/drivers/wireless/gs2200m.c
index 0694823963d..29553745d47 100644
--- a/drivers/wireless/gs2200m.c
+++ b/drivers/wireless/gs2200m.c
@@ -702,7 +702,7 @@ static ssize_t gs2200m_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct gs2200m_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ASSERT(1 == len);
 
@@ -2969,7 +2969,7 @@ static int gs2200m_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct gs2200m_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Lock the device */
 
@@ -3107,7 +3107,7 @@ static int gs2200m_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct gs2200m_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = nxmutex_lock(&dev->dev_lock);
   if (ret < 0)
diff --git a/drivers/wireless/lpwan/sx127x/sx127x.c b/drivers/wireless/lpwan/sx127x/sx127x.c
index 7afc5649e0a..c909e010a53 100644
--- a/drivers/wireless/lpwan/sx127x/sx127x.c
+++ b/drivers/wireless/lpwan/sx127x/sx127x.c
@@ -741,7 +741,7 @@ static int sx127x_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct sx127x_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -794,7 +794,7 @@ static int sx127x_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct sx127x_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -837,7 +837,7 @@ static ssize_t sx127x_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct sx127x_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = nxmutex_lock(&dev->dev_lock);
   if (ret < 0)
@@ -890,7 +890,7 @@ static ssize_t sx127x_write(FAR struct file *filep, FAR const char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct sx127x_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = nxmutex_lock(&dev->dev_lock);
   if (ret < 0)
@@ -961,7 +961,7 @@ static int sx127x_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct sx127x_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1176,7 +1176,7 @@ static int sx127x_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct sx127x_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Exclusive access */
 
diff --git a/drivers/wireless/nrf24l01.c b/drivers/wireless/nrf24l01.c
index f26537067fe..2f0c770b8ec 100644
--- a/drivers/wireless/nrf24l01.c
+++ b/drivers/wireless/nrf24l01.c
@@ -945,7 +945,7 @@ static int nrf24l01_open(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct nrf24l01_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -988,7 +988,7 @@ static int nrf24l01_close(FAR struct file *filep)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev  = (FAR struct nrf24l01_dev_s *)inode->i_private;
+  dev  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1022,7 +1022,7 @@ static ssize_t nrf24l01_read(FAR struct file *filep, FAR char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct nrf24l01_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = nxmutex_lock(&dev->devlock);
   if (ret < 0)
@@ -1072,7 +1072,7 @@ static ssize_t nrf24l01_write(FAR struct file *filep, FAR const char *buffer,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct nrf24l01_dev_s *)inode->i_private;
+  dev = inode->i_private;
 
   ret = nxmutex_lock(&dev->devlock);
   if (ret < 0)
@@ -1100,7 +1100,7 @@ static int nrf24l01_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev  = (FAR struct nrf24l01_dev_s *)inode->i_private;
+  dev  = inode->i_private;
 
   /* Get exclusive access to the driver data structure */
 
@@ -1361,7 +1361,7 @@ static int nrf24l01_poll(FAR struct file *filep, FAR struct pollfd *fds,
   inode = filep->f_inode;
 
   DEBUGASSERT(inode->i_private);
-  dev  = (FAR struct nrf24l01_dev_s *)inode->i_private;
+  dev  = inode->i_private;
 
   /* Exclusive access */
 
diff --git a/fs/cromfs/fs_cromfs.c b/fs/cromfs/fs_cromfs.c
index d828cb39fd0..6f773fefc85 100644
--- a/fs/cromfs/fs_cromfs.c
+++ b/fs/cromfs/fs_cromfs.c
@@ -1097,7 +1097,7 @@ static int cromfs_dup(FAR const struct file *oldp, FAR struct file *newp)
 
   /* Recover our private data from the struct file instance */
 
-  fs = (FAR struct cromfs_volume_s *)oldp->f_inode->i_private;
+  fs = oldp->f_inode->i_private;
   DEBUGASSERT(fs != NULL);
 
   /* Get the open file instance from the file structure */
diff --git a/fs/fat/fs_fat32.c b/fs/fat/fs_fat32.c
index c7cbb8783f5..7e086635e83 100644
--- a/fs/fat/fs_fat32.c
+++ b/fs/fat/fs_fat32.c
@@ -1476,7 +1476,7 @@ static int fat_dup(FAR const struct file *oldp, FAR struct file *newp)
 
   /* Recover our private data from the struct file instance */
 
-  fs = (struct fat_mountpt_s *)oldp->f_inode->i_private;
+  fs = oldp->f_inode->i_private;
 
   DEBUGASSERT(fs != NULL);
 
diff --git a/fs/mount/fs_automount.c b/fs/mount/fs_automount.c
index f40af53217e..dada5368c8d 100644
--- a/fs/mount/fs_automount.c
+++ b/fs/mount/fs_automount.c
@@ -254,7 +254,7 @@ static int automount_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct automounter_state_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
@@ -321,7 +321,7 @@ static int automount_ioctl(FAR struct file *filep, int cmd,
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  priv  = (FAR struct automounter_state_s *)inode->i_private;
+  priv  = inode->i_private;
 
   /* Get exclusive access to the driver structure */
 
diff --git a/fs/nfs/nfs_vfsops.c b/fs/nfs/nfs_vfsops.c
index acb72b185b7..b79f5276203 100644
--- a/fs/nfs/nfs_vfsops.c
+++ b/fs/nfs/nfs_vfsops.c
@@ -659,7 +659,7 @@ static int nfs_open(FAR struct file *filep, FAR const char *relpath,
    * mountpoint private data from the inode structure
    */
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   DEBUGASSERT(nmp != NULL);
 
   /* Pre-allocate the file private data to describe the opened file. */
@@ -777,7 +777,7 @@ static int nfs_close(FAR struct file *filep)
 
   /* Recover our private data from the struct file instance */
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   np  = (FAR struct nfsnode *)filep->f_priv;
 
   DEBUGASSERT(nmp != NULL);
@@ -880,7 +880,7 @@ static ssize_t nfs_read(FAR struct file *filep, FAR char *buffer,
 
   /* Recover our private data from the struct file instance */
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   np  = (FAR struct nfsnode *)filep->f_priv;
 
   DEBUGASSERT(nmp != NULL);
@@ -1055,7 +1055,7 @@ static ssize_t nfs_write(FAR struct file *filep, FAR const char *buffer,
 
   /* Recover our private data from the struct file instance */
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   np  = (FAR struct nfsnode *)filep->f_priv;
 
   DEBUGASSERT(nmp != NULL);
@@ -1232,7 +1232,7 @@ static off_t nfs_seek(FAR struct file *filep, off_t offset, int whence)
 
   /* Recover our private data from the struct file instance */
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   np  = (FAR struct nfsnode *)filep->f_priv;
 
   DEBUGASSERT(nmp != NULL);
@@ -1311,7 +1311,7 @@ static int nfs_dup(FAR const struct file *oldp, FAR struct file *newp)
 
   /* Recover our private data from the struct file instance */
 
-  nmp = (FAR struct nfsmount *)oldp->f_inode->i_private;
+  nmp = oldp->f_inode->i_private;
   np  = (FAR struct nfsnode *)oldp->f_priv;
 
   DEBUGASSERT(nmp != NULL);
@@ -1358,7 +1358,7 @@ static int nfs_fstat(FAR const struct file *filep, FAR struct stat *buf)
   DEBUGASSERT(filep->f_priv != NULL);
   np  = (FAR struct nfsnode *)filep->f_priv;
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   DEBUGASSERT(nmp != NULL);
 
   memset(buf, 0, sizeof(*buf));
@@ -1410,7 +1410,7 @@ static int nfs_fchstat(FAR const struct file *filep,
   DEBUGASSERT(filep->f_priv != NULL);
   np  = (FAR struct nfsnode *)filep->f_priv;
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   DEBUGASSERT(nmp != NULL);
 
   ret = nxmutex_lock(&nmp->nm_lock);
@@ -1447,7 +1447,7 @@ static int nfs_truncate(FAR struct file *filep, off_t length)
 
   /* Recover our private data from the struct file instance */
 
-  nmp = (FAR struct nfsmount *)filep->f_inode->i_private;
+  nmp = filep->f_inode->i_private;
   np  = (FAR struct nfsnode *)filep->f_priv;
 
   DEBUGASSERT(nmp != NULL);
@@ -2380,7 +2380,7 @@ static int nfs_statfs(FAR struct inode *mountpt, FAR struct statfs *sbp)
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
 
   ret = nxmutex_lock(&nmp->nm_lock);
   if (ret < 0)
@@ -2452,7 +2452,7 @@ static int nfs_remove(FAR struct inode *mountpt, FAR const char *relpath)
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
 
   ret = nxmutex_lock(&nmp->nm_lock);
   if (ret < 0)
@@ -2535,7 +2535,7 @@ static int nfs_mkdir(FAR struct inode *mountpt, FAR const char *relpath,
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
 
   ret = nxmutex_lock(&nmp->nm_lock);
   if (ret < 0)
@@ -2660,7 +2660,7 @@ static int nfs_rmdir(FAR struct inode *mountpt, FAR const char *relpath)
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
 
   ret = nxmutex_lock(&nmp->nm_lock);
   if (ret < 0)
@@ -2746,7 +2746,7 @@ static int nfs_rename(FAR struct inode *mountpt, FAR const char *oldrelpath,
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
 
   ret = nxmutex_lock(&nmp->nm_lock);
   if (ret < 0)
@@ -2916,7 +2916,7 @@ static int nfs_stat(FAR struct inode *mountpt, FAR const char *relpath,
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
   DEBUGASSERT(nmp && buf);
 
   memset(buf, 0, sizeof(*buf));
@@ -2983,7 +2983,7 @@ static int nfs_chstat(FAR struct inode *mountpt, FAR const char *relpath,
 
   /* Get the mountpoint private data from the inode structure */
 
-  nmp = (FAR struct nfsmount *)mountpt->i_private;
+  nmp = mountpt->i_private;
   DEBUGASSERT(nmp && buf);
 
   ret = nxmutex_lock(&nmp->nm_lock);
diff --git a/fs/nxffs/nxffs_open.c b/fs/nxffs/nxffs_open.c
index 055f616a72e..b3bf24ea7a4 100644
--- a/fs/nxffs/nxffs_open.c
+++ b/fs/nxffs/nxffs_open.c
@@ -1000,7 +1000,7 @@ int nxffs_open(FAR struct file *filep, FAR const char *relpath,
    * file structure
    */
 
-  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  volume = filep->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 
   /* Limitation:  A file must be opened for reading or writing, but not both.
@@ -1066,7 +1066,7 @@ int nxffs_dup(FAR const struct file *oldp, FAR struct file *newp)
    * file structure
    */
 
-  volume = (FAR struct nxffs_volume_s *)oldp->f_inode->i_private;
+  volume = oldp->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 #endif
 
@@ -1124,7 +1124,7 @@ int nxffs_close(FAR struct file *filep)
 
   /* Recover the volume state from the open file */
 
-  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  volume = filep->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 
   /* Get exclusive access to the volume.  Note that the volume lock
diff --git a/fs/nxffs/nxffs_read.c b/fs/nxffs/nxffs_read.c
index d035f465a86..31e33fe7090 100644
--- a/fs/nxffs/nxffs_read.c
+++ b/fs/nxffs/nxffs_read.c
@@ -150,7 +150,7 @@ ssize_t nxffs_read(FAR struct file *filep, FAR char *buffer, size_t buflen)
 
   /* Recover the volume state from the open file */
 
-  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  volume = filep->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 
   /* Get exclusive access to the volume.  Note that the volume lock
diff --git a/fs/nxffs/nxffs_stat.c b/fs/nxffs/nxffs_stat.c
index 9d0e84d1c31..b0df7dbc661 100644
--- a/fs/nxffs/nxffs_stat.c
+++ b/fs/nxffs/nxffs_stat.c
@@ -190,7 +190,7 @@ int nxffs_fstat(FAR const struct file *filep, FAR struct stat *buf)
 
   /* Recover the volume state from the open file */
 
-  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  volume = filep->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 
   /* Get exclusive access to the volume.  Note that the volume lock
diff --git a/fs/nxffs/nxffs_truncate.c b/fs/nxffs/nxffs_truncate.c
index cbaa8c788db..ff6056e63c3 100644
--- a/fs/nxffs/nxffs_truncate.c
+++ b/fs/nxffs/nxffs_truncate.c
@@ -65,7 +65,7 @@ int nxffs_truncate(FAR struct file *filep, off_t length)
 
   /* Recover the volume state from the open file */
 
-  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  volume = filep->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 
   /* Get exclusive access to the volume.  Note that the volume lock
diff --git a/fs/nxffs/nxffs_write.c b/fs/nxffs/nxffs_write.c
index a4726eabc27..64d5d5bbc65 100644
--- a/fs/nxffs/nxffs_write.c
+++ b/fs/nxffs/nxffs_write.c
@@ -527,7 +527,7 @@ ssize_t nxffs_write(FAR struct file *filep, FAR const char *buffer,
 
   /* Recover the volume state from the open file */
 
-  volume = (FAR struct nxffs_volume_s *)filep->f_inode->i_private;
+  volume = filep->f_inode->i_private;
   DEBUGASSERT(volume != NULL);
 
   /* Get exclusive access to the volume.  Note that the volume lock
diff --git a/fs/romfs/fs_romfs.c b/fs/romfs/fs_romfs.c
index 742181a8f7b..d03c88b8d47 100644
--- a/fs/romfs/fs_romfs.c
+++ b/fs/romfs/fs_romfs.c
@@ -173,7 +173,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
    * structure
    */
 
-  rm = (FAR struct romfs_mountpt_s *)filep->f_inode->i_private;
+  rm = filep->f_inode->i_private;
 
   DEBUGASSERT(rm != NULL);
 
diff --git a/fs/shm/shmfs.c b/fs/shm/shmfs.c
index c9df5a660cb..fef22222efd 100644
--- a/fs/shm/shmfs.c
+++ b/fs/shm/shmfs.c
@@ -366,7 +366,7 @@ static int shmfs_mmap(FAR struct file *filep,
   ret = inode_addref(filep->f_inode);
   if (ret >= 0)
     {
-      object = (FAR struct shmfs_object_s *)filep->f_inode->i_private;
+      object = filep->f_inode->i_private;
       if (object)
         {
           ret = shmfs_map_object(object, &entry->vaddr);
diff --git a/fs/unionfs/fs_unionfs.c b/fs/unionfs/fs_unionfs.c
index e2e0ebabde9..2a998526c0c 100644
--- a/fs/unionfs/fs_unionfs.c
+++ b/fs/unionfs/fs_unionfs.c
@@ -852,7 +852,7 @@ static int unionfs_open(FAR struct file *filep, FAR const char *relpath,
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   finfo("Opening: ui_nopen=%d\n", ui->ui_nopen);
 
@@ -940,7 +940,7 @@ static int unionfs_close(FAR struct file *filep)
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   /* Get exclusive access to the file system data structures */
 
@@ -1006,7 +1006,7 @@ static ssize_t unionfs_read(FAR struct file *filep, FAR char *buffer,
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1039,7 +1039,7 @@ static ssize_t unionfs_write(FAR struct file *filep, FAR const char *buffer,
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1071,7 +1071,7 @@ static off_t unionfs_seek(FAR struct file *filep, off_t offset, int whence)
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1149,7 +1149,7 @@ static int unionfs_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1181,7 +1181,7 @@ static int unionfs_sync(FAR struct file *filep)
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1216,7 +1216,7 @@ static int unionfs_dup(FAR const struct file *oldp, FAR struct file *newp)
   /* Recover the open file data from the struct file instance */
 
   DEBUGASSERT(oldp != NULL && oldp->f_inode != NULL);
-  ui = (FAR struct unionfs_inode_s *)oldp->f_inode->i_private;
+  ui = oldp->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && oldp->f_priv != NULL);
   oldpriv = (FAR struct unionfs_file_s *)oldp->f_priv;
@@ -1282,7 +1282,7 @@ static int unionfs_fstat(FAR const struct file *filep, FAR struct stat *buf)
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1320,7 +1320,7 @@ static int unionfs_fchstat(FAR const struct file *filep,
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1356,7 +1356,7 @@ static int unionfs_truncate(FAR struct file *filep, off_t length)
 
   /* Recover the open file data from the struct file instance */
 
-  ui = (FAR struct unionfs_inode_s *)filep->f_inode->i_private;
+  ui = filep->f_inode->i_private;
 
   DEBUGASSERT(ui != NULL && filep->f_priv != NULL);
   uf = (FAR struct unionfs_file_s *)filep->f_priv;
@@ -1396,7 +1396,7 @@ static int unionfs_opendir(FAR struct inode *mountpt,
   /* Recover the filesystem data from the struct inode instance */
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   udir = kmm_zalloc(sizeof(*udir));
   if (udir == NULL)
@@ -1536,7 +1536,7 @@ static int unionfs_closedir(FAR struct inode *mountpt,
   /* Recover the union file system data from the struct inode instance */
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* Get exclusive access to the file system data structures */
 
@@ -1619,7 +1619,7 @@ static int unionfs_readdir(FAR struct inode *mountpt,
   /* Recover the union file system data from the struct inode instance */
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   DEBUGASSERT(dir);
   udir = (FAR struct unionfs_dir_s *)dir;
@@ -1874,7 +1874,7 @@ static int unionfs_rewinddir(struct inode *mountpt, struct fs_dirent_s *dir)
   /* Recover the union file system data from the struct inode instance */
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   DEBUGASSERT(dir);
   udir = (FAR struct unionfs_dir_s *)dir;
@@ -2032,7 +2032,7 @@ static int unionfs_statfs(FAR struct inode *mountpt, FAR struct statfs *buf)
   /* Recover the union file system data from the struct inode instance */
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL && buf != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* Get statfs info from file system 1.
    *
@@ -2158,7 +2158,7 @@ static int unionfs_unlink(FAR struct inode *mountpt,
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL &&
               relpath != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* Check if some exists at this path on file system 1.  This might be
    * a file or a directory
@@ -2222,7 +2222,7 @@ static int unionfs_mkdir(FAR struct inode *mountpt, FAR const char *relpath,
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL &&
               relpath != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* Is there anything with this name on either file system? */
 
@@ -2273,7 +2273,7 @@ static int unionfs_rmdir(FAR struct inode *mountpt, FAR const char *relpath)
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL &&
               relpath != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* We really don't know any better so we will try to remove the directory
    * from both file systems.
@@ -2336,7 +2336,7 @@ static int unionfs_rename(FAR struct inode *mountpt,
   /* Recover the union file system data from the struct inode instance */
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   DEBUGASSERT(oldrelpath != NULL && oldrelpath != NULL);
 
@@ -2401,7 +2401,7 @@ static int unionfs_stat(FAR struct inode *mountpt, FAR const char *relpath,
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL &&
               relpath != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* stat this path on file system 1 */
 
@@ -2478,7 +2478,7 @@ static int unionfs_chstat(FAR struct inode *mountpt, FAR const char *relpath,
 
   DEBUGASSERT(mountpt != NULL && mountpt->i_private != NULL &&
               relpath != NULL);
-  ui = (FAR struct unionfs_inode_s *)mountpt->i_private;
+  ui = mountpt->i_private;
 
   /* chstat this path on file system 1 */
 
diff --git a/graphics/nxterm/nxterm_driver.c b/graphics/nxterm/nxterm_driver.c
index 09864a40e9e..71520fe3e25 100644
--- a/graphics/nxterm/nxterm_driver.c
+++ b/graphics/nxterm/nxterm_driver.c
@@ -110,7 +110,7 @@ static int nxterm_open(FAR struct file *filep)
   /* Get the driver structure from the inode */
 
   inode = filep->f_inode;
-  priv  = (FAR struct nxterm_state_s *)inode->i_private;
+  priv  = inode->i_private;
   DEBUGASSERT(priv);
 
   /* Verify that the driver is opened for write-only access */
diff --git a/wireless/ieee802154/mac802154_device.c b/wireless/ieee802154/mac802154_device.c
index 309e6decb5d..758087940d8 100644
--- a/wireless/ieee802154/mac802154_device.c
+++ b/wireless/ieee802154/mac802154_device.c
@@ -229,7 +229,7 @@ static int mac802154dev_close(FAR struct file *filep)
   opriv = filep->f_priv;
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct mac802154_chardevice_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Handle an improbable race conditions with the following atomic test
    * and set.
@@ -339,7 +339,7 @@ static ssize_t mac802154dev_read(FAR struct file *filep, FAR char *buffer,
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct mac802154_chardevice_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Check to make sure the buffer is the right size for the struct */
 
@@ -484,7 +484,7 @@ static ssize_t mac802154dev_write(FAR struct file *filep,
 
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  dev  = (FAR struct mac802154_chardevice_s *)inode->i_private;
+  dev  = inode->i_private;
 
   /* Check if the struct is the correct size */
 
@@ -554,7 +554,7 @@ static int mac802154dev_ioctl(FAR struct file *filep, int cmd,
               filep->f_inode != NULL);
   inode = filep->f_inode;
   DEBUGASSERT(inode->i_private);
-  dev = (FAR struct mac802154_chardevice_s *)inode->i_private;
+  dev = inode->i_private;
 
   /* Get exclusive access to the driver structure */