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sched/docs: Align ETC ROMFS text with tmpfs-first /tmp mount.

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Update ETC_ROMFS help text and NSH/ROMFS guides to describe the
/tmp mount behavior as tmpfs-first with FAT RAMDISK fallback when
CONFIG_FS_TMPFS is not enabled.

Signed-off-by: Arjav Patel <arjav1528@gmail.com>
This commit is contained in:
Arjav Patel 2026-04-23 07:33:38 +05:30 • committed by Alan C. Assis
parent bf0848dbd6
commit f51052d780
3 changed files with 39 additions and 24 deletions
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34
sched/Kconfig
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@ -552,8 +552,9 @@ menuconfig ETC_ROMFS
---help---
Mount a ROMFS filesystem at /etc and provide a system init
script at /etc/init.d/rc.sysinit and a startup script
at /etc/init.d/rcS. The default system init script will mount
a FAT FS RAMDISK at /tmp but the logic is easily extensible.
at /etc/init.d/rcS. The default system init script mounts
/tmp as TMPFS when FS_TMPFS is enabled, otherwise it can
fall back to mounting a FAT FS RAMDISK at /tmp.
if ETC_ROMFS
@ -591,37 +592,40 @@ config ETC_FATDEVNO
default 1
depends on FS_FAT
---help---
When the default rcS file used when ETC_ROMFS is selected, it
will mount a FAT FS under /tmp. This is the minor number of the FAT
FS block device. The default is '1' corresponding to /dev/ram1.
When ETC_ROMFS is selected and FS_TMPFS is disabled, the
default rc.sysinit script mounts a FAT FS under /tmp. This
is the minor number of the FAT FS block device. The default
is '1' corresponding to /dev/ram1.
config ETC_FATSECTSIZE
int "FAT sector size"
default 512
depends on FS_FAT
---help---
When the default rcS file used when ETC_ROMFS is selected, it
will mount a FAT FS under /tmp. This is the sector size use with the
FAT FS. Default is 512.
When ETC_ROMFS is selected and FS_TMPFS is disabled, the
default rc.sysinit script mounts a FAT FS under /tmp. This
is the sector size used with the FAT FS. Default is 512.
config ETC_FATNSECTORS
int "FAT number of sectors"
default 1024
depends on FS_FAT
---help---
When the default rcS file used when ETC_ROMFS is selected, it
will mount a FAT FS under /tmp. This is the number of sectors to use
with the FAT FS. Default is 1024. The amount of memory used by the
FAT FS will be ETC_FATSECTSIZE * ETC_FATNSECTORS bytes.
When ETC_ROMFS is selected and FS_TMPFS is disabled, the
default rc.sysinit script mounts a FAT FS under /tmp. This
is the number of sectors to use with the FAT FS. Default is
1024. The amount of memory used by the FAT FS will be
ETC_FATSECTSIZE * ETC_FATNSECTORS bytes.
config ETC_FATMOUNTPT
string "FAT mount point"
default "/tmp"
depends on FS_FAT
---help---
When the default rcS file used when ETC_ROMFS is selected, it
will mount a FAT FS under /tmp. This is the location where the FAT
FS will be mounted. Default is "/tmp".
When ETC_ROMFS is selected and FS_TMPFS is disabled, the
default rc.sysinit script mounts a FAT FS under /tmp. This
is the location where the FAT FS will be mounted. Default is
"/tmp".
endif # ETC_ROMFS