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| author | Ingo Molnar <mingo@kernel.org> | 2018-04-12 10:42:34 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-04-12 10:42:34 +0300 |
| commit | ef389b734691cdc8beb009dd402135dcdcb86a56 (patch) | |
| tree | 9523a37db93cb7c7874a5f18b4d9a7014898b814 /include/linux/bitmap.h | |
| parent | a774635db5c430cbf21fa5d2f2df3d23aaa8e782 (diff) | |
| parent | c76fc98260751e71c884dc1a18a07e427ef033b5 (diff) | |
| download | linux-ef389b734691cdc8beb009dd402135dcdcb86a56.tar.xz | |
Merge branch 'WIP.x86/asm' into x86/urgent, because the topic is ready
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/bitmap.h')
| -rw-r--r-- | include/linux/bitmap.h | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h index 5f11fbdc27f8..1ee46f492267 100644 --- a/include/linux/bitmap.h +++ b/include/linux/bitmap.h @@ -302,12 +302,20 @@ static inline void bitmap_complement(unsigned long *dst, const unsigned long *sr __bitmap_complement(dst, src, nbits); } +#ifdef __LITTLE_ENDIAN +#define BITMAP_MEM_ALIGNMENT 8 +#else +#define BITMAP_MEM_ALIGNMENT (8 * sizeof(unsigned long)) +#endif +#define BITMAP_MEM_MASK (BITMAP_MEM_ALIGNMENT - 1) + static inline int bitmap_equal(const unsigned long *src1, const unsigned long *src2, unsigned int nbits) { if (small_const_nbits(nbits)) return !((*src1 ^ *src2) & BITMAP_LAST_WORD_MASK(nbits)); - if (__builtin_constant_p(nbits & 7) && IS_ALIGNED(nbits, 8)) + if (__builtin_constant_p(nbits & BITMAP_MEM_MASK) && + IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT)) return !memcmp(src1, src2, nbits / 8); return __bitmap_equal(src1, src2, nbits); } @@ -358,8 +366,10 @@ static __always_inline void bitmap_set(unsigned long *map, unsigned int start, { if (__builtin_constant_p(nbits) && nbits == 1) __set_bit(start, map); - else if (__builtin_constant_p(start & 7) && IS_ALIGNED(start, 8) && - __builtin_constant_p(nbits & 7) && IS_ALIGNED(nbits, 8)) + else if (__builtin_constant_p(start & BITMAP_MEM_MASK) && + IS_ALIGNED(start, BITMAP_MEM_ALIGNMENT) && + __builtin_constant_p(nbits & BITMAP_MEM_MASK) && + IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT)) memset((char *)map + start / 8, 0xff, nbits / 8); else __bitmap_set(map, start, nbits); @@ -370,8 +380,10 @@ static __always_inline void bitmap_clear(unsigned long *map, unsigned int start, { if (__builtin_constant_p(nbits) && nbits == 1) __clear_bit(start, map); - else if (__builtin_constant_p(start & 7) && IS_ALIGNED(start, 8) && - __builtin_constant_p(nbits & 7) && IS_ALIGNED(nbits, 8)) + else if (__builtin_constant_p(start & BITMAP_MEM_MASK) && + IS_ALIGNED(start, BITMAP_MEM_ALIGNMENT) && + __builtin_constant_p(nbits & BITMAP_MEM_MASK) && + IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT)) memset((char *)map + start / 8, 0, nbits / 8); else __bitmap_clear(map, start, nbits); |