diff options
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 */ |