diff mbox series

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

Message ID 20230815004813.555115-4-vgupta@kernel.org
State New
Headers show
Series ARC updates | expand

Commit Message

Vineet Gupta Aug. 15, 2023, 12:47 a.m. UTC 
Signed-off-by: Vineet Gupta <vgupta@kernel.org>
---
 arch/arc/include/asm/uaccess.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)
diff mbox series

Patch

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;