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| author | Wei Yang <richard.weiyang@gmail.com> | 2024-07-10 19:27:01 +0200 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2024-07-10 23:24:27 +0200 |
| commit | 692a68ee9c3c4ab984ae45a74a7569f14222d5aa (patch) | |
| tree | 1d50ed4196cc34bf51344b918c520a04681e7829 /tools/include | |
| parent | bitops: Add a comment explaining the double underscore macros (diff) | |
| download | linux-692a68ee9c3c4ab984ae45a74a7569f14222d5aa.tar.xz linux-692a68ee9c3c4ab984ae45a74a7569f14222d5aa.zip | |
radix tree test suite: put definition of bitmap_clear() into lib/bitmap.c
In tools/ directory, function bitmap_clear() is currently only used in
object file tools/testing/radix-tree/xarray.o.
But instead of keeping a bitmap.c with only bitmap_clear() definition in
radix-tree's own directory, it would be more proper to put it in common
directory lib/.
Sync the kernel definition and link some related libs, no functional
change is expected.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
CC: Matthew Wilcox <willy@infradead.org>
CC: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/linux/bitmap.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h index 210c13b1b857..2a7f260ef9dc 100644 --- a/tools/include/linux/bitmap.h +++ b/tools/include/linux/bitmap.h @@ -19,7 +19,7 @@ bool __bitmap_and(unsigned long *dst, const unsigned long *bitmap1, const unsigned long *bitmap2, unsigned int bits); bool __bitmap_equal(const unsigned long *bitmap1, const unsigned long *bitmap2, unsigned int bits); -void bitmap_clear(unsigned long *map, unsigned int start, int len); +void __bitmap_clear(unsigned long *map, unsigned int start, int len); bool __bitmap_intersects(const unsigned long *bitmap1, const unsigned long *bitmap2, unsigned int bits); @@ -150,4 +150,19 @@ static inline bool bitmap_intersects(const unsigned long *src1, return __bitmap_intersects(src1, src2, nbits); } +static inline void bitmap_clear(unsigned long *map, unsigned int start, + unsigned int nbits) +{ + if (__builtin_constant_p(nbits) && nbits == 1) + __clear_bit(start, map); + else if (small_const_nbits(start + nbits)) + *map &= ~GENMASK(start + nbits - 1, start); + 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); +} #endif /* _TOOLS_LINUX_BITMAP_H */ |