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asm-generic/atomic.h: fix type used in atomic_clear_mask 

The atomic helpers are supposed to take an atomic_t pointer, not a random
unsigned long pointer.  So convert atomic_clear_mask over.

While we're here, also add some nice documentation to the func.

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 3eea44ea75
commit f6081bd3f8
1 changed files with 9 additions and 2 deletions
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11
include/asm-generic/atomic.h
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@ -140,13 +140,20 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u)
return c;
}
static inline void atomic_clear_mask(unsigned long mask, unsigned long *addr)
/**
* atomic_clear_mask - Atomically clear bits in atomic variable
* @mask: Mask of the bits to be cleared
* @v: pointer of type atomic_t
*
* Atomically clears the bits set in @mask from @v
*/
static inline void atomic_clear_mask(unsigned long mask, atomic_t *v)
{
unsigned long flags;
mask = ~mask;
raw_local_irq_save(flags); /* Don't trace it in a irqsoff handler */
*addr &= mask;
v->counter &= mask;
raw_local_irq_restore(flags);
}