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asm-generic/atomic.h: add atomic_set_mask() helper

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Since arches are expected to implement this guy, add a common version for
people the same way as atomic_clear_mask is handled.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mike Frysinger 2011-07-26 16:09:10 -07:00 committed by Linus Torvalds
parent f6081bd3f8
commit 00b3c28bd7
1 changed files with 16 additions and 0 deletions
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16
include/asm-generic/atomic.h
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@ -157,6 +157,22 @@ static inline void atomic_clear_mask(unsigned long mask, atomic_t *v)
raw_local_irq_restore(flags);
}
/**
* atomic_set_mask - Atomically set bits in atomic variable
* @mask: Mask of the bits to be set
* @v: pointer of type atomic_t
*
* Atomically sets the bits set in @mask in @v
*/
static inline void atomic_set_mask(unsigned int mask, atomic_t *v)
{
unsigned long flags;
raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */
v->counter |= mask;
raw_local_irq_restore(flags);
}
/* Assume that atomic operations are already serializing */
#define smp_mb__before_atomic_dec() barrier()
#define smp_mb__after_atomic_dec() barrier()