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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>
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1 changed files with 1 additions and 4 deletions
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@ -2874,10 +2874,7 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this,
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void lockdep_init_map(struct lockdep_map *lock, const char *name,
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struct lock_class_key *key, int subclass)
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{
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int i;
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for (i = 0; i < NR_LOCKDEP_CACHING_CLASSES; i++)
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lock->class_cache[i] = NULL;
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memset(lock, 0, sizeof(*lock));
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#ifdef CONFIG_LOCK_STAT
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lock->cpu = raw_smp_processor_id();
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