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| author | Tejun Heo <tj@kernel.org> | 2011-07-14 15:19:09 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-08-04 10:17:56 +0200 |
| commit | f59de8992aa6dc85e81aadc26b0f69e17809721d (patch) | |
| tree | 4cdb87598edb67a774281bf3cea2800114d2fa0c /kernel/lockdep.c | |
| parent | 83835b3d9aec8e9f666d8223d8a386814f756266 (diff) | |
| download | blackbird-op-linux-f59de8992aa6dc85e81aadc26b0f69e17809721d.tar.gz blackbird-op-linux-f59de8992aa6dc85e81aadc26b0f69e17809721d.zip | |
lockdep: Clear whole lockdep_map on initialization
lockdep_init_map() only initializes parts of lockdep_map and triggers
kmemcheck warning when it is copied as a whole. There isn't anything
to be gained by clearing selectively. memset() the whole structure
and remove loop for ->class_cache[] clearing.
Addresses https://bugzilla.kernel.org/show_bug.cgi?id=35532
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-tested-by: Christian Casteyde <casteyde.christian@free.fr>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=35532
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110714131909.GJ3455@htj.dyndns.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/lockdep.c')
| -rw-r--r-- | kernel/lockdep.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 5903586f32a0..8c24294e477f 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -2874,10 +2874,7 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this, void lockdep_init_map(struct lockdep_map *lock, const char *name, struct lock_class_key *key, int subclass) { - int i; - - for (i = 0; i < NR_LOCKDEP_CACHING_CLASSES; i++) - lock->class_cache[i] = NULL; + memset(lock, 0, sizeof(*lock)); #ifdef CONFIG_LOCK_STAT lock->cpu = raw_smp_processor_id(); |
