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Merge branch 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 

* 'core-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  lockdep: Fix wrong assumption in match_held_lock
This commit is contained in:
Linus Torvalds 2011-08-17 10:25:08 -07:00
parent 950d0a10d1 80e0401e35
commit 2da9f365fc
1 changed files with 7 additions and 1 deletions
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8
kernel/lockdep.c
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@ -3111,7 +3111,13 @@ static int match_held_lock(struct held_lock *hlock, struct lockdep_map *lock)
if (!class)
class = look_up_lock_class(lock, 0);
if (DEBUG_LOCKS_WARN_ON(!class))
/*
* If look_up_lock_class() failed to find a class, we're trying
* to test if we hold a lock that has never yet been acquired.
* Clearly if the lock hasn't been acquired _ever_, we're not
* holding it either, so report failure.
*/
if (!class)
return 0;
if (DEBUG_LOCKS_WARN_ON(!hlock->nest_lock))