Add volatile qualifier

This is needed to ensure that the memory mapped address it always read. Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
aggarg · Oct 16, 2024 · a5dcc18 · a5dcc18
1 parent b3e6cff
commit a5dcc18
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diff --git a/.gitignore b/.gitignore
@@ -11,6 +11,7 @@
 [Oo]bj/
 [Ll]og/
 [Ll]ogs/
+[Bb]uild/
 
 # CodeWarrior temporary files
 *.tdt

diff --git a/FreeRTOS/Demo/RISC-V-Qemu-virt_GCC/ns16550.c b/FreeRTOS/Demo/RISC-V-Qemu-virt_GCC/ns16550.c
@@ -64,7 +64,7 @@ static void writeb( uint8_t b, uintptr_t addr )
 
 void vOutNS16550( struct device *dev, unsigned char c )
 {
-	uintptr_t addr = dev->addr;
+	volatile uintptr_t addr = dev->addr;
 
 	while ( (readb( addr + REG_LSR ) & LSR_THRE) == 0 ) {
 		/* busy wait */
-Original file line number
+Diff line change
@@ Expand Up / @@ -11,6 +11,7 @@ @@
     [Oo]bj/
     [Ll]og/
     [Ll]ogs/
+    [Bb]uild/
     # CodeWarrior temporary files
     *.tdt
@@ Expand Down @@