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atomic: Provide atomic_{or,xor,and}

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Implement atomic logic ops -- atomic_{or,xor,and}.

These will replace the atomic_{set,clear}_mask functions that are
available on some archs.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Peter Zijlstra
2014-04-23 19:32:50 +02:00
committed by Thomas Gleixner
parent 2957c03539
commit e6942b7de2
29 changed files with 19 additions and 68 deletions
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13
include/linux/atomic.h
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@@ -111,19 +111,6 @@ static inline int atomic_dec_if_positive(atomic_t *v)
}
#endif
#ifndef CONFIG_ARCH_HAS_ATOMIC_OR
static inline void atomic_or(int i, atomic_t *v)
{
int old;
int new;
do {
old = atomic_read(v);
new = old | i;
} while (atomic_cmpxchg(v, old, new) != old);
}
#endif /* #ifndef CONFIG_ARCH_HAS_ATOMIC_OR */
#include <asm-generic/atomic-long.h>
#ifdef CONFIG_GENERIC_ATOMIC64
#include <asm-generic/atomic64.h>