diff options
| -rw-r--r-- | include/linux/atomic.h | 21 | ||||
| -rw-r--r-- | kernel/sched/core.c | 14 |
2 files changed, 21 insertions, 14 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h index 301de78..6c502cb 100644 --- a/include/linux/atomic.h +++ b/include/linux/atomic.h @@ -548,6 +548,27 @@ static inline int atomic_dec_if_positive(atomic_t *v) } #endif +/** + * fetch_or - perform *ptr |= mask and return old value of *ptr + * @ptr: pointer to value + * @mask: mask to OR on the value + * + * cmpxchg based fetch_or, macro so it works for different integer types + */ +#ifndef fetch_or +#define fetch_or(ptr, mask) \ +({ typeof(*(ptr)) __old, __val = *(ptr); \ + for (;;) { \ + __old = cmpxchg((ptr), __val, __val | (mask)); \ + if (__old == __val) \ + break; \ + __val = __old; \ + } \ + __old; \ +}) +#endif + + #ifdef CONFIG_GENERIC_ATOMIC64 #include <asm-generic/atomic64.h> #endif diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 9503d59..7142feb 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -453,20 +453,6 @@ static inline void init_hrtick(void) } #endif /* CONFIG_SCHED_HRTICK */ -/* - * cmpxchg based fetch_or, macro so it works for different integer types - */ -#define fetch_or(ptr, val) \ -({ typeof(*(ptr)) __old, __val = *(ptr); \ - for (;;) { \ - __old = cmpxchg((ptr), __val, __val | (val)); \ - if (__old == __val) \ - break; \ - __val = __old; \ - } \ - __old; \ -}) - #if defined(CONFIG_SMP) && defined(TIF_POLLING_NRFLAG) /* * Atomically set TIF_NEED_RESCHED and test for TIF_POLLING_NRFLAG, |