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| author | Ingo Molnar <mingo@kernel.org> | 2014-12-12 09:09:03 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-12-12 09:09:03 +0100 |
| commit | 3459f0d78ffe27a1b341c22eb158b622eaaea3fc (patch) | |
| tree | 715b0575eec541d0181876ad367ca5480cdcecf3 /tools/perf/util/include/linux/bitmap.h | |
| parent | 9fc81d87420d0d3fd62d5e5529972c0ad9eab9cc (diff) | |
| parent | bee2782f30f66898be3f74ad02e4d1f87a969694 (diff) | |
| download | linux-3459f0d78ffe27a1b341c22eb158b622eaaea3fc.tar.gz linux-3459f0d78ffe27a1b341c22eb158b622eaaea3fc.tar.xz | |
Merge branch 'linus' into perf/urgent, to pick up the upstream merged bits
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/util/include/linux/bitmap.h')
| -rw-r--r-- | tools/perf/util/include/linux/bitmap.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tools/perf/util/include/linux/bitmap.h b/tools/perf/util/include/linux/bitmap.h index 01ffd12dc791..40bd21488032 100644 --- a/tools/perf/util/include/linux/bitmap.h +++ b/tools/perf/util/include/linux/bitmap.h @@ -46,4 +46,21 @@ static inline void bitmap_or(unsigned long *dst, const unsigned long *src1, __bitmap_or(dst, src1, src2, nbits); } +/** + * test_and_set_bit - Set a bit and return its old value + * @nr: Bit to set + * @addr: Address to count from + */ +static inline int test_and_set_bit(int nr, unsigned long *addr) +{ + unsigned long mask = BIT_MASK(nr); + unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr); + unsigned long old; + + old = *p; + *p = old | mask; + + return (old & mask) != 0; +} + #endif /* _PERF_BITOPS_H */ |