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lockdep: Introduce lockdep_assert_held()

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Add a lockdep helper to validate that we indeed are the owner
of a lock.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra
2009-07-20 19:16:29 +02:00
committed by Ingo Molnar
parent 98c33eddaf
commit f607c66857
3 changed files with 43 additions and 0 deletions
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8
include/linux/lockdep.h
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@@ -296,6 +296,10 @@ extern void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
extern void lock_release(struct lockdep_map *lock, int nested,
unsigned long ip);
#define lockdep_is_held(lock) lock_is_held(&(lock)->dep_map)
extern int lock_is_held(struct lockdep_map *lock);
extern void lock_set_class(struct lockdep_map *lock, const char *name,
struct lock_class_key *key, unsigned int subclass,
unsigned long ip);
@@ -314,6 +318,8 @@ extern void lockdep_trace_alloc(gfp_t mask);
#define lockdep_depth(tsk) (debug_locks ? (tsk)->lockdep_depth : 0)
#define lockdep_assert_held(l) WARN_ON(debug_locks && !lockdep_is_held(l))
#else /* !LOCKDEP */
static inline void lockdep_off(void)
@@ -358,6 +364,8 @@ struct lock_class_key { };
#define lockdep_depth(tsk) (0)
#define lockdep_assert_held(l) do { } while (0)
#endif /* !LOCKDEP */
#ifdef CONFIG_LOCK_STAT