From 27c3b23226fc649de47e4886ccbf994482f388ba Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Wed, 13 Dec 2006 00:34:42 -0800
Subject: [PATCH] [PATCH] lockdep: use chain hash on CONFIG_DEBUG_LOCKDEP too
CONFIG_DEBUG_LOCKDEP is unacceptably slow because it does not utilize
the chain-hash. Turn the chain-hash back on in this case too.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
kernel/lockdep.c | 8 --------
1 file changed, 8 deletions(-)
diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index c4ffd3c1dec4..69e92c6b0472 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -1276,14 +1276,6 @@ static inline int lookup_chain_cache(u64 chain_key, struct lock_class *class)
if (chain->chain_key == chain_key) {
cache_hit:
debug_atomic_inc(&chain_lookup_hits);
- /*
- * In the debugging case, force redundant checking
- * by returning 1:
- */
-#ifdef CONFIG_DEBUG_LOCKDEP
- __raw_spin_lock(&hash_lock);
- return 1;
-#endif
if (very_verbose(class))
printk("\nhash chain already cached, key: %016Lx tail class: [%p] %s\n", chain_key, class->key, class->name);
return 0;
--
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