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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2008-08-11 09:30:24 +0200
committerIngo Molnar <mingo@elte.hu>2008-08-11 09:30:24 +0200
commitb7d39aff91454f2534db2275f55908656ec0470c (patch)
tree24481f2fe7206ef69800a33df6ac3e1716085326 /include/linux/spinlock_api_smp.h
parent7531e2f34d1d551b096143f19111139f0dd84c8b (diff)
lockdep: spin_lock_nest_lock()
Expose the new lock protection lock. This can be used to annotate places where we take multiple locks of the same class and avoid deadlocks by always taking another (top-level) lock first. NOTE: we're still bound to the MAX_LOCK_DEPTH (48) limit. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/spinlock_api_smp.h')
-rw-r--r--include/linux/spinlock_api_smp.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
index 8a2307ce7296..d79845d034b5 100644
--- a/include/linux/spinlock_api_smp.h
+++ b/include/linux/spinlock_api_smp.h
@@ -22,6 +22,8 @@ int in_lock_functions(unsigned long addr);
void __lockfunc _spin_lock(spinlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
__acquires(lock);
+void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map)
+ __acquires(lock);
void __lockfunc _read_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(lock);