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| author | Peter Zijlstra <peterz@infradead.org> | 2014-04-23 19:40:25 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-07-27 14:06:23 +0200 |
| commit | 304a0d699a3c6103b61d5ea18d56820e7d8e3116 (patch) | |
| tree | dd0166235d2a1dc0c7a152e6faa825d2794cc3a0 /arch/sparc/lib/atomic32.c | |
| parent | 658aa51459c2f5284183d35b6dd0beca0e0bfe2f (diff) | |
| download | op-kernel-dev-304a0d699a3c6103b61d5ea18d56820e7d8e3116.zip op-kernel-dev-304a0d699a3c6103b61d5ea18d56820e7d8e3116.tar.gz | |
sparc: Provide atomic_{or,xor,and}
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/sparc/lib/atomic32.c')
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index 71cd65a..b9d63c0 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -27,22 +27,38 @@ static DEFINE_SPINLOCK(dummy); #endif /* SMP */ -#define ATOMIC_OP(op, cop) \ +#define ATOMIC_OP_RETURN(op, c_op) \ 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); \ + ret = (v->counter c_op i); \ \ spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \ return ret; \ } \ EXPORT_SYMBOL(atomic_##op##_return); -ATOMIC_OP(add, +=) +#define ATOMIC_OP(op, c_op) \ +void atomic_##op(int i, atomic_t *v) \ +{ \ + unsigned long flags; \ + spin_lock_irqsave(ATOMIC_HASH(v), flags); \ + \ + v->counter c_op i; \ + \ + spin_unlock_irqrestore(ATOMIC_HASH(v), flags); \ +} \ +EXPORT_SYMBOL(atomic_##op); + +ATOMIC_OP_RETURN(add, +=) +ATOMIC_OP(and, &=) +ATOMIC_OP(or, |=) +ATOMIC_OP(xor, ^=) +#undef ATOMIC_OP_RETURN #undef ATOMIC_OP int atomic_xchg(atomic_t *v, int new) |
