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Message-ID: <20071005041939.20566.51093.stgit@ghaskins-t60p.haskins.net> Date: Fri, 05 Oct 2007 00:22:12 -0400 From: Gregory Haskins <ghaskins@...ell.com> To: mingo@...e.hu Cc: linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org, ghaskins@...ell.com Subject: [PATCH] LOCKDEP: fix mismatched lockdep_depth/curr_chain_hash Doh! I guess there should be a rule about sending patches out after midnight ;) The original patch I worked on was written before the code was moved to validate_chain(), so my previous posting didnt quite translate when I merged with git HEAD. Here is an updated patch. Sorry for the confusion. Regards, -Greg --- kernel/lockdep.c | 10 +++++----- 1 files changed, 5 insertions(+), 5 deletions(-) diff --git a/kernel/lockdep.c b/kernel/lockdep.c index 734da57..42ae4a5 100644 --- a/kernel/lockdep.c +++ b/kernel/lockdep.c @@ -1521,7 +1521,7 @@ cache_hit: } static int validate_chain(struct task_struct *curr, struct lockdep_map *lock, - struct held_lock *hlock, int chain_head) + struct held_lock *hlock, int chain_head, u64 chain_key) { /* * Trylock needs to maintain the stack of held locks, but it @@ -1534,7 +1534,7 @@ static int validate_chain(struct task_struct *curr, struct lockdep_map *lock, * graph_lock for us) */ if (!hlock->trylock && (hlock->check == 2) && - lookup_chain_cache(curr->curr_chain_key, hlock->class)) { + lookup_chain_cache(chain_key, hlock->class)) { /* * Check whether last held lock: * @@ -1576,7 +1576,7 @@ static int validate_chain(struct task_struct *curr, struct lockdep_map *lock, #else static inline int validate_chain(struct task_struct *curr, struct lockdep_map *lock, struct held_lock *hlock, - int chain_head) + int chain_head, u64 chain_key) { return 1; } @@ -2450,11 +2450,11 @@ static int __lock_acquire(struct lockdep_map *lock, unsigned int subclass, chain_head = 1; } chain_key = iterate_chain_key(chain_key, id); - curr->curr_chain_key = chain_key; - if (!validate_chain(curr, lock, hlock, chain_head)) + if (!validate_chain(curr, lock, hlock, chain_head, chain_key)) return 0; + curr->curr_chain_key = chain_key; curr->lockdep_depth++; check_chain_key(curr); #ifdef CONFIG_DEBUG_LOCKDEP - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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