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| author | Ingo Molnar <mingo@elte.hu> | 2010-10-30 04:43:08 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-10-30 04:43:08 -0400 |
| commit | 169ed55bd30305b933f52bfab32a58671d44ab68 (patch) | |
| tree | 32e280957474f458901abfce16fa2a1687ef7497 /include/asm-generic/atomic.h | |
| parent | 3d7851b3cdd43a734e5cc4c643fd886ab28ad4d5 (diff) | |
| parent | 45f81b1c96d9793e47ce925d257ea693ce0b193e (diff) | |
Merge branch 'tip/perf/jump-label-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/urgent
Diffstat (limited to 'include/asm-generic/atomic.h')
| -rw-r--r-- | include/asm-generic/atomic.h | 34 |
1 files changed, 17 insertions, 17 deletions
diff --git a/include/asm-generic/atomic.h b/include/asm-generic/atomic.h index fd57b8477fab..e994197f84b7 100644 --- a/include/asm-generic/atomic.h +++ b/include/asm-generic/atomic.h | |||
| @@ -120,14 +120,23 @@ static inline void atomic_dec(atomic_t *v) | |||
| 120 | #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) | 120 | #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) |
| 121 | #define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) | 121 | #define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) |
| 122 | 122 | ||
| 123 | #define atomic_add_unless(v, a, u) \ | 123 | #define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) |
| 124 | ({ \ | 124 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) |
| 125 | int c, old; \ | 125 | |
| 126 | c = atomic_read(v); \ | 126 | #define cmpxchg_local(ptr, o, n) \ |
| 127 | while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ | 127 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ |
| 128 | c = old; \ | 128 | (unsigned long)(n), sizeof(*(ptr)))) |
| 129 | c != (u); \ | 129 | |
| 130 | }) | 130 | #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) |
| 131 | |||
| 132 | static inline int atomic_add_unless(atomic_t *v, int a, int u) | ||
| 133 | { | ||
| 134 | int c, old; | ||
| 135 | c = atomic_read(v); | ||
| 136 | while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c) | ||
| 137 | c = old; | ||
| 138 | return c != u; | ||
| 139 | } | ||
| 131 | 140 | ||
| 132 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) | 141 | #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) |
| 133 | 142 | ||
| @@ -141,15 +150,6 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) | |||
| 141 | raw_local_irq_restore(flags); | 150 | raw_local_irq_restore(flags); |
| 142 | } | 151 | } |
| 143 | 152 | ||
| 144 | #define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) | ||
| 145 | #define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) | ||
| 146 | |||
| 147 | #define cmpxchg_local(ptr, o, n) \ | ||
| 148 | ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ | ||
| 149 | (unsigned long)(n), sizeof(*(ptr)))) | ||
| 150 | |||
| 151 | #define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) | ||
| 152 | |||
| 153 | /* Assume that atomic operations are already serializing */ | 153 | /* Assume that atomic operations are already serializing */ |
| 154 | #define smp_mb__before_atomic_dec() barrier() | 154 | #define smp_mb__before_atomic_dec() barrier() |
| 155 | #define smp_mb__after_atomic_dec() barrier() | 155 | #define smp_mb__after_atomic_dec() barrier() |
