diff options
Diffstat (limited to 'arch/arc/include/asm/bitops.h')
| -rw-r--r-- | arch/arc/include/asm/bitops.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arc/include/asm/bitops.h b/arch/arc/include/asm/bitops.h index fb98440c0bd4..325512148c7b 100644 --- a/arch/arc/include/asm/bitops.h +++ b/arch/arc/include/asm/bitops.h @@ -315,6 +315,8 @@ static inline __attribute__ ((const)) int fls(unsigned long x) */ static inline __attribute__ ((const)) int __fls(unsigned long x) { + if (__builtin_constant_p(x)) + return x ? BITS_PER_LONG - 1 - __builtin_clzl(x) : 0; /* FLS insn has exactly same semantics as the API */ return __builtin_arc_fls(x); } |