Messages in this thread Patch in this message | | | From | Jia He <> | Subject | [PATCH v3 3/3] linux/bitmap: Replace find_fisrt_{zero_}bit with the new lightweight api | Date | Thu, 19 Nov 2015 14:48:44 +0800 |
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This is to replace find_fisrt_{zero_}bit with the new lightweight api all_bit_is_{one,zero} in bitmap_{full,empty}
Signed-off-by: Jia He <hejianet@gmail.com> --- include/linux/bitmap.h | 4 ++-- include/linux/bitops.h | 3 +++ 2 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 15524f6..8877a68 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -281,7 +281,7 @@ static inline int bitmap_empty(const unsigned long *src, unsigned nbits) if (small_const_nbits(nbits)) return ! (*src & BITMAP_LAST_WORD_MASK(nbits)); - return find_first_bit(src, nbits) == nbits; + return all_bit_is_zero(src, nbits); } static inline int bitmap_full(const unsigned long *src, unsigned int nbits) @@ -289,7 +289,7 @@ static inline int bitmap_full(const unsigned long *src, unsigned int nbits) if (small_const_nbits(nbits)) return ! (~(*src) & BITMAP_LAST_WORD_MASK(nbits)); - return find_first_zero_bit(src, nbits) == nbits; + return all_bit_is_one(src, nbits); } static __always_inline int bitmap_weight(const unsigned long *src, unsigned int nbits) diff --git a/include/linux/bitops.h b/include/linux/bitops.h index b881028..e34f2ff 100644 --- a/include/linux/bitops.h +++ b/include/linux/bitops.h @@ -214,6 +214,9 @@ static inline unsigned long __ffs64(u64 word) return __ffs((unsigned long)word); } +extern unsigned int all_bit_is_one(const unsigned long *addr, unsigned size); +extern unsigned int all_bit_is_zero(const unsigned long *addr, unsigned size); + #ifdef __KERNEL__ #ifndef set_mask_bits -- 2.5.0
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