AcoSail/kernel_optimize_test
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introduce write_trylock_irqsave()

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Introduce a write_trylock_irqsave() implementation.  Similar in style to
the implementation of spin_trylock_irqsave() in mainline.

Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in>
Cc: Sripathi Kodi <sripathik@in.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Satyam Sharma 2007-07-15 23:39:24 -07:00 committed by Linus Torvalds
parent b5d425c97f
commit e1f4a88c5a
1 changed files with 7 additions and 0 deletions
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7
include/linux/spinlock.h
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@ -282,6 +282,13 @@ do { \
1 : ({ local_irq_restore(flags); 0; }); \
})
#define write_trylock_irqsave(lock, flags) \
({ \
local_irq_save(flags); \
write_trylock(lock) ? \
1 : ({ local_irq_restore(flags); 0; }); \
})
/*
* Locks two spinlocks l1 and l2.
* l1_first indicates if spinlock l1 should be taken first.