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ARC: uaccess: elide unaliged handling if hardware supports

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Signed-off-by: Vineet Gupta <vgupta@kernel.org>
This commit is contained in:
Vineet Gupta 2020-02-03 11:43:22 -08:00
parent f798f91e7f
commit c8ee610afe
1 changed files with 6 additions and 4 deletions
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10
arch/arc/include/asm/uaccess.h
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@ -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;