From 6cc8b30aaf9d21162a4bcae9eef703df4da49407 Mon Sep 17 00:00:00 2001
From: ligd <liguiding1@xiaomi.com>
Date: Tue, 29 Dec 2020 17:25:04 +0800
Subject: [PATCH] serial: fix build break caused by previous patch

serial/serial_dma.c: In function 'uart_check_signo':
serial/serial_dma.c:82:18: error: 'SIGINT' undeclared (first use in this function)
   82 |           return SIGINT;
      |                  ^~~~~~

This is canused by:
remove #include <nuttx/mqueue.h> from include/nuttx/fs/fs.h in:
d1ede9ac904d331ee6b22343f5d7f0ead7a113a6

Change-Id: I20260ad3bcceb30207c9c12041dd95de41e13777
---
 drivers/serial/serial_dma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/serial/serial_dma.c b/drivers/serial/serial_dma.c
index b3915c01217..87010543f99 100644
--- a/drivers/serial/serial_dma.c
+++ b/drivers/serial/serial_dma.c
@@ -42,6 +42,7 @@
 #include <sys/types.h>
 #include <stdint.h>
 #include <debug.h>
+#include <signal.h>
 
 #include <nuttx/serial/serial.h>