From: Jarek Poplawski <jarkao2@o2.pl>
To: linux-kernel@vger.kernel.org
Cc: Ingo Molnar <mingo@elte.hu>
Subject: [PATCH] lockdep: debug_locks check after check_chain_key
Date: Mon, 12 Feb 2007 14:47:53 +0100 [thread overview]
Message-ID: <20070212134753.GA7737@ff.dom.local> (raw)
In __lock_acquire check_chain_key can turn off
debug_locks, so check is needed to assure proper
return code.
Signed-off-by: Jarek Poplawski <jarkao2@o2.pl>
---
diff -Nurp linux-2.6.20-git7-/kernel/lockdep.c linux-2.6.20-git7/kernel/lockdep.c
--- linux-2.6.20-git7-/kernel/lockdep.c 2007-02-12 13:13:15.000000000 +0100
+++ linux-2.6.20-git7/kernel/lockdep.c 2007-02-12 14:18:31.000000000 +0100
@@ -2228,6 +2228,10 @@ out_calc_hash:
curr->lockdep_depth++;
check_chain_key(curr);
+#ifdef CONFIG_DEBUG_LOCKDEP
+ if (unlikely(!debug_locks))
+ return 0;
+#endif
if (unlikely(curr->lockdep_depth >= MAX_LOCK_DEPTH)) {
debug_locks_off();
printk("BUG: MAX_LOCK_DEPTH too low!\n");
reply other threads:[~2007-02-12 13:44 UTC|newest]
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