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| author | Peter Zijlstra <peterz@infradead.org> | 2014-03-26 18:29:28 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-08-14 12:48:13 +0200 |
| commit | 4f3316c2b5fe2062c26c9b66915b5a5c80c60a5c (patch) | |
| tree | 1ed6ef20fc6b7aa7c6b33a4135dc664a0c2901fe /arch/sparc/lib/atomic32.c | |
| parent | locking,arch,sh: Fold atomic_ops (diff) | |
| download | linux-4f3316c2b5fe2062c26c9b66915b5a5c80c60a5c.tar.xz linux-4f3316c2b5fe2062c26c9b66915b5a5c80c60a5c.zip | |
locking,arch,sparc: Fold atomic_ops
Many of the atomic op implementations are the same except for one
instruction; fold the lot into a few CPP macros and reduce LoC.
This also prepares for easy addition of new ops.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Kirill Tkhai <tkhai@yandex.ru>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/20140508135852.825281379@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/sparc/lib/atomic32.c')
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 29 |
1 files changed, 17 insertions, 12 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index 1d32b54089aa..a7c418ac26af 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -27,18 +27,23 @@ static DEFINE_SPINLOCK(dummy); #endif /* SMP */ -int __atomic_add_return(int i, atomic_t *v) -{ - int ret; - unsigned long flags; - spin_lock_irqsave(ATOMIC_HASH(v), flags); - - ret = (v->counter += i); - - spin_unlock_irqrestore(ATOMIC_HASH(v), flags); - return ret; -} -EXPORT_SYMBOL(__atomic_add_return); +#define ATOMIC_OP(op, cop) \ +int atomic_##op##_return(int i, atomic_t *v) \ +{ \ + int ret; \ + unsigned long flags; \ + spin_lock_irqsave(ATOMIC_HASH(v), flags); \ + \ + ret = (v->counter cop i); \ + \ + spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \ + return ret; \ +} \ +EXPORT_SYMBOL(atomic_##op##_return); + +ATOMIC_OP(add, +=) + +#undef ATOMIC_OP int atomic_cmpxchg(atomic_t *v, int old, int new) { |