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workqueue: avoid false negative in assert_manager_or_pool_lock()

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If lockdep complains something for other subsystem, lockdep_is_held()
can be false negative, so we need to also test debug_locks before
triggering WARN.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Lai Jiangshan 2013-03-20 03:28:21 +08:00 committed by Tejun Heo
parent 881094532e
commit 519e3c1163
1 changed files with 2 additions and 1 deletions
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3
kernel/workqueue.c
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@ -305,7 +305,8 @@ static void copy_workqueue_attrs(struct workqueue_attrs *to,
#ifdef CONFIG_LOCKDEP
#define assert_manager_or_pool_lock(pool) \
WARN_ONCE(!lockdep_is_held(&(pool)->manager_mutex) && \
WARN_ONCE(debug_locks && \
!lockdep_is_held(&(pool)->manager_mutex) && \
!lockdep_is_held(&(pool)->lock), \
"pool->manager_mutex or ->lock should be held")
#else