diff options
| -rw-r--r-- | arch/x86/include/asm/bitops.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h index 100413aff640..bbaf75ea6703 100644 --- a/arch/x86/include/asm/bitops.h +++ b/arch/x86/include/asm/bitops.h @@ -248,7 +248,7 @@ arch_test_bit_acquire(unsigned long nr, const volatile unsigned long *addr) static __always_inline unsigned long variable__ffs(unsigned long word) { - asm("rep; bsf %1,%0" + asm("tzcnt %1,%0" : "=r" (word) : ASM_INPUT_RM (word)); return word; @@ -267,7 +267,7 @@ static __always_inline unsigned long variable__ffs(unsigned long word) static __always_inline unsigned long variable_ffz(unsigned long word) { - asm("rep; bsf %1,%0" + asm("tzcnt %1,%0" : "=r" (word) : "r" (~word)); return word; |