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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-22 11:17:06 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-22 11:17:06 -0700 |
commit | db08bf0877f3464fb0c2c37dcdd9f9683192ea26 (patch) | |
tree | c9d47587ac07cb1622156899414c78f097fcb0c9 /include/asm-generic/atomic.h | |
parent | 092e0e7e520a1fca03e13c9f2d157432a8657ff2 (diff) | |
parent | 35dbc0e020c6587f78a6c17693beca73aead7b54 (diff) | |
download | linux-db08bf0877f3464fb0c2c37dcdd9f9683192ea26.tar.gz linux-db08bf0877f3464fb0c2c37dcdd9f9683192ea26.tar.bz2 linux-db08bf0877f3464fb0c2c37dcdd9f9683192ea26.zip |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
* git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic/io.h: allow people to override individual funcs
bitops: remove duplicated extern declarations
bitops: make asm-generic/bitops/find.h more generic
asm-generic: kdebug.h: Checkpatch cleanup
asm-generic: fcntl: make exported headers use strict posix types
asm-generic: cmpxchg does not handle non-long arguments
asm-generic: make atomic_add_unless a function
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) #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) #define atomic_inc_and_test(v) (atomic_add_return(1, (v)) == 0) -#define atomic_add_unless(v, a, u) \ -({ \ - int c, old; \ - c = atomic_read(v); \ - while (c != (u) && (old = atomic_cmpxchg((v), c, c + (a))) != c) \ - c = old; \ - c != (u); \ -}) +#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) +#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) + +#define cmpxchg_local(ptr, o, n) \ + ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ + (unsigned long)(n), sizeof(*(ptr)))) + +#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) + +static inline int atomic_add_unless(atomic_t *v, int a, int u) +{ + int c, old; + c = atomic_read(v); + while (c != u && (old = atomic_cmpxchg(v, c, c + a)) != c) + c = old; + return c != u; +} #define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) @@ -141,15 +150,6 @@ static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr) raw_local_irq_restore(flags); } -#define atomic_xchg(ptr, v) (xchg(&(ptr)->counter, (v))) -#define atomic_cmpxchg(v, old, new) (cmpxchg(&((v)->counter), (old), (new))) - -#define cmpxchg_local(ptr, o, n) \ - ((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\ - (unsigned long)(n), sizeof(*(ptr)))) - -#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n)) - /* Assume that atomic operations are already serializing */ #define smp_mb__before_atomic_dec() barrier() #define smp_mb__after_atomic_dec() barrier() |