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| author |   Davidlohr Bueso <dave@stgolabs.net> | 2015-09-30 13:03:11 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-10-06 17:28:19 +0200 |
| commit | 63ab7bd0d450b726b88fa4b932f151b98cee2557 (patch) | |
| tree | f0c6505750c3e1889e813916778f6f974936d10f /include/asm-generic | |
| parent | Merge tag 'v4.3-rc4' into locking/core, to pick up fixes before applying new changes (diff) | |
| download | linux-dev-63ab7bd0d450b726b88fa4b932f151b98cee2557.tar.xz linux-dev-63ab7bd0d450b726b88fa4b932f151b98cee2557.zip | |
locking/asm-generic: Add _{relaxed|acquire|release}() variants for inc/dec atomics
Similar to what we have for regular add/sub calls. For now, no actual arch
implements them, so everyone falls back to the default atomics... iow,
nothing changes. These will be used in future primitives.
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul E.McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-kernel@vger.kernel.org
Link: http://lkml.kernel.org/r/1443643395-17016-2-git-send-email-dave@stgolabs.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/atomic-long.h | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/include/asm-generic/atomic-long.h b/include/asm-generic/atomic-long.h index 8942cdc676a7..f91093c2984c 100644 --- a/include/asm-generic/atomic-long.h +++ b/include/asm-generic/atomic-long.h @@ -159,19 +159,24 @@ static inline int atomic_long_add_negative(long i, atomic_long_t *l) return ATOMIC_LONG_PFX(_add_negative)(i, v); } -static inline long atomic_long_inc_return(atomic_long_t *l) -{ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; - - return (long)ATOMIC_LONG_PFX(_inc_return)(v); -} - -static inline long atomic_long_dec_return(atomic_long_t *l) -{ - ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; - - return (long)ATOMIC_LONG_PFX(_dec_return)(v); +#define ATOMIC_LONG_INC_DEC_OP(op, mo) \ +static inline long \ +atomic_long_##op##_return##mo(atomic_long_t *l) \ +{ \ + ATOMIC_LONG_PFX(_t) *v = (ATOMIC_LONG_PFX(_t) *)l; \ + \ + return (long)ATOMIC_LONG_PFX(_##op##_return##mo)(v); \ } +ATOMIC_LONG_INC_DEC_OP(inc,) +ATOMIC_LONG_INC_DEC_OP(inc, _relaxed) +ATOMIC_LONG_INC_DEC_OP(inc, _acquire) +ATOMIC_LONG_INC_DEC_OP(inc, _release) +ATOMIC_LONG_INC_DEC_OP(dec,) +ATOMIC_LONG_INC_DEC_OP(dec, _relaxed) +ATOMIC_LONG_INC_DEC_OP(dec, _acquire) +ATOMIC_LONG_INC_DEC_OP(dec, _release) + +#undef ATOMIC_LONG_INC_DEC_OP static inline long atomic_long_add_unless(atomic_long_t *l, long a, long u) { |