linux-kernel - [PATCH 4/4] Export __lockdep_no_validate_

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Date:	Tue, 15 Jan 2013 13:25:42 -0800
From:	Kent Overstreet <koverstreet@...gle.com>
To:	linux-kernel@...r.kernel.org, linux-bcache@...r.kernel.org
Cc:	Kent Overstreet <koverstreet@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>
Subject: [PATCH 4/4] Export __lockdep_no_validate__

Hack, but bcache needs a way around lockdep for locking during garbage
collection - we need to keep multiple btree nodes locked for coalescing
and rw_lock_nested() isn't really sufficient or appropriate here.

Signed-off-by: Kent Overstreet <koverstreet@...gle.com>
CC: Peter Zijlstra <peterz@...radead.org>
CC: Ingo Molnar <mingo@...hat.com>
---
 kernel/lockdep.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/lockdep.c b/kernel/lockdep.c
index 7981e5b..861fbeb 100644
--- a/kernel/lockdep.c
+++ b/kernel/lockdep.c
@@ -2997,6 +2997,7 @@ void lockdep_init_map(struct lockdep_map *lock, const char *name,
 EXPORT_SYMBOL_GPL(lockdep_init_map);
 
 struct lock_class_key __lockdep_no_validate__;
+EXPORT_SYMBOL_GPL(__lockdep_no_validate__);
 
 static int
 print_lock_nested_lock_not_held(struct task_struct *curr,
-- 
1.7.12

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