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Commit 00b3c28b authored by Mike Frysinger's avatar Mike Frysinger Committed by Linus Torvalds
Browse files

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



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: default avatarMike Frysinger <vapier@gentoo.org>
Cc: Arun Sharma <asharma@fb.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f6081bd3

include/asm-generic/atomic.h

+16 −0
Original line number Original line Diff line number Diff line
@@ -157,6 +157,22 @@ static inline void atomic_clear_mask(unsigned long mask, atomic_t *v) 
	raw_local_irq_restore(flags);

	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 */

/* Assume that atomic operations are already serializing */

#define smp_mb__before_atomic_dec()	barrier()

#define smp_mb__before_atomic_dec()	barrier()

#define smp_mb__after_atomic_dec()	barrier()

#define smp_mb__after_atomic_dec()	barrier()