[PATCH 03/20] ARC: uaccess: elide unaliged handling if hardware supports

Vineet Gupta
2023-08-15T00:48:57Z

arch/arc/include/asm/uaccess.h | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/arc/include/asm/uaccess.h b/arch/arc/include/asm/uaccess.h
index d2da159bb80a..1e8809ea000a 100644
--- a/arch/arc/include/asm/uaccess.h
+++ b/arch/arc/include/asm/uaccess.h
@@ -146,8 +146,9 @@ raw_copy_from_user(void *to, const void __user *from, unsigned long n)
if (n == 0)
return 0;

- /* unaligned */
- if (((unsigned long)to & 0x3) || ((unsigned long)from & 0x3)) {
+ /* fallback for unaligned access when hardware doesn't support */
+ if (!IS_ENABLED(CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS) &&
+ (((unsigned long)to & 0x3) || ((unsigned long)from & 0x3))) {

unsigned char tmp;

@@ -373,8 +374,9 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
if (n == 0)
return 0;

- /* unaligned */
- if (((unsigned long)to & 0x3) || ((unsigned long)from & 0x3)) {
+ /* fallback for unaligned access when hardware doesn't support */
+ if (!IS_ENABLED(CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS) &&
+ (((unsigned long)to & 0x3) || ((unsigned long)from & 0x3))) {

unsigned char tmp;

--
2.34.1