diff options
Diffstat (limited to 'tools/include/asm-generic/atomic-gcc.h')
| -rw-r--r-- | tools/include/asm-generic/atomic-gcc.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/tools/include/asm-generic/atomic-gcc.h b/tools/include/asm-generic/atomic-gcc.h index 6daa68bf5b9e..9b3c528bab92 100644 --- a/tools/include/asm-generic/atomic-gcc.h +++ b/tools/include/asm-generic/atomic-gcc.h @@ -70,7 +70,7 @@ static inline int atomic_cmpxchg(atomic_t *v, int oldval, int newval) return cmpxchg(&(v)->counter, oldval, newval); } -static inline int atomic_test_and_set_bit(long nr, unsigned long *addr) +static inline int test_and_set_bit(long nr, unsigned long *addr) { unsigned long mask = BIT_MASK(nr); long old; @@ -81,4 +81,15 @@ static inline int atomic_test_and_set_bit(long nr, unsigned long *addr) return !!(old & mask); } +static inline int test_and_clear_bit(long nr, unsigned long *addr) +{ + unsigned long mask = BIT_MASK(nr); + long old; + + addr += BIT_WORD(nr); + + old = __sync_fetch_and_and(addr, ~mask); + return !!(old & mask); +} + #endif /* __TOOLS_ASM_GENERIC_ATOMIC_H */ |