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Revert "bitmap: fix memset optimization on big-endian systems"

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This reverts commit ac5a36bb69570bc5bdd68f21c6793abc0b110cb7.

Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Signed-off-by: alk3pInjection <webmaster@raspii.tech>
Signed-off-by: azrim <mirzaspc@gmail.com>
This commit is contained in:
Park Ju Hyung 2019-11-30 17:57:15 +09:00 committed by azrim
parent 9ff6a40ee8
commit 2348f797a4
No known key found for this signature in database
GPG Key ID: 497F8FB059B45D1C
1 changed files with 5 additions and 17 deletions
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22
include/linux/bitmap.h
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@ -275,20 +275,12 @@ 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 & BITMAP_MEM_MASK) &&
IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT))
if (__builtin_constant_p(nbits & 7) && IS_ALIGNED(nbits, 8))
return !memcmp(src1, src2, nbits / 8);
return __bitmap_equal(src1, src2, nbits);
}
@ -339,10 +331,8 @@ 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 & BITMAP_MEM_MASK) &&
IS_ALIGNED(start, BITMAP_MEM_ALIGNMENT) &&
__builtin_constant_p(nbits & BITMAP_MEM_MASK) &&
IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT))
else if (__builtin_constant_p(start & 7) && IS_ALIGNED(start, 8) &&
__builtin_constant_p(nbits & 7) && IS_ALIGNED(nbits, 8))
memset((char *)map + start / 8, 0xff, nbits / 8);
else
__bitmap_set(map, start, nbits);
@ -353,10 +343,8 @@ 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 & BITMAP_MEM_MASK) &&
IS_ALIGNED(start, BITMAP_MEM_ALIGNMENT) &&
__builtin_constant_p(nbits & BITMAP_MEM_MASK) &&
IS_ALIGNED(nbits, BITMAP_MEM_ALIGNMENT))
else if (__builtin_constant_p(start & 7) && IS_ALIGNED(start, 8) &&
__builtin_constant_p(nbits & 7) && IS_ALIGNED(nbits, 8))
memset((char *)map + start / 8, 0, nbits / 8);
else
__bitmap_clear(map, start, nbits);