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authorArjan van de Ven <arjan@linux.intel.com>2006-11-25 11:09:37 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-11-25 13:28:34 -0800
commitcfd3ef2346f924d6c0e82236c20fdb3a8840136a (patch)
treef0289367f0dbf80a5bcfa2969f428c605c54dd6a /include/linux
parentee3ce191e8eaa4cc15c51a28b34143b36404c4f5 (diff)
[PATCH] lockdep: spin_lock_irqsave_nested()
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>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/spinlock.h18
-rw-r--r--include/linux/spinlock_api_smp.h2
2 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 54ad37089c49..57f670d78f7c 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -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)
diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
index 8828b8155e9c..8a2307ce7296 100644
--- a/include/linux/spinlock_api_smp.h
+++ b/include/linux/spinlock_api_smp.h
@@ -32,6 +32,8 @@ void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
__acquires(lock);
+unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
+ __acquires(lock);
unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)