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[PATCH] lockdep: spin_lock_irqsave_nested()

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Introduce spin_lock_irqsave_nested(); implementation from:
 http://lkml.org/lkml/2006/6/1/122
Patch from:
 http://lkml.org/lkml/2006/9/13/258

[akpm@osdl.org: two compile fixes]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Signed-off-by: Jiri Kosina <jikos@jikos.cz>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Arjan van de Ven 2006-11-25 11:09:37 -08:00 • committed by Linus Torvalds
parent ee3ce191e8
commit cfd3ef2346
3 changed files with 41 additions and 0 deletions
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18
include/linux/spinlock.h
View file

@ -199,6 +199,21 @@ do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _write_lock_irqsave(lock); \
} while (0)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
#define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _spin_lock_irqsave_nested(lock, subclass); \
} while (0)
#else
#define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
flags = _spin_lock_irqsave(lock); \
} while (0)
#endif
#else
#define spin_lock_irqsave(lock, flags) \
do { \
@ -215,6 +230,9 @@ do { \
BUILD_CHECK_IRQ_FLAGS(flags); \
_write_lock_irqsave(lock, flags); \
} while (0)
#define spin_lock_irqsave_nested(lock, flags, subclass) \
spin_lock_irqsave(lock, flags)
#endif
#define spin_lock_irq(lock) _spin_lock_irq(lock)