diff options
Diffstat (limited to 'include/linux/bitops.h')
| -rw-r--r-- | include/linux/bitops.h | 19 |
1 files changed, 3 insertions, 16 deletions
diff --git a/include/linux/bitops.h b/include/linux/bitops.h index 3112ae7d6524..46d4bdc634c0 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -8,13 +8,6 @@ #include <uapi/linux/kernel.h> -/* Set bits in the first 'n' bytes when loaded from memory */ -#ifdef __LITTLE_ENDIAN -# define aligned_byte_mask(n) ((1UL << 8*(n))-1) -#else -# define aligned_byte_mask(n) (~0xffUL << (BITS_PER_LONG - 8 - 8*(n))) -#endif - #define BITS_PER_TYPE(type) (sizeof(type) * BITS_PER_BYTE) #define BITS_TO_LONGS(nr) __KERNEL_DIV_ROUND_UP(nr, BITS_PER_TYPE(long)) #define BITS_TO_U64(nr) __KERNEL_DIV_ROUND_UP(nr, BITS_PER_TYPE(u64)) @@ -257,16 +250,10 @@ static inline unsigned int __ffs64(u64 word) */ static inline unsigned int fns(unsigned long word, unsigned int n) { - unsigned int bit; - - while (word) { - bit = __ffs(word); - if (n-- == 0) - return bit; - __clear_bit(bit, &word); - } + while (word && n--) + word &= word - 1; - return BITS_PER_LONG; + return word ? __ffs(word) : BITS_PER_LONG; } /** |