diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-08-17 10:25:08 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-08-17 10:25:08 -0700 |
| commit | 2da9f365fc401b79627bc7be56d8a2b4ee9b390b (patch) | |
| tree | b5b2d0f6893b353a60c215bb979eee80a9f3fdf5 /kernel | |
| parent | 950d0a10d12578a270f3dfa9fd76fe5c2deb343f (diff) | |
| parent | 80e0401e35410a69bfae05b454db8a7187edd6b8 (diff) | |
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
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/lockdep.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 8c24294e477f..91d67ce3a8d5 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -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)) |