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[3/3] rcu: use rt_mutex_lock_irqdisabled() in rcu_boost()

Message ID 20111206032933.GC17091@zhy
State New
Headers show

Commit Message

Yong Zhang Dec. 6, 2011, 3:29 a.m. UTC 
Otherwise we will get false positive warning from might_sleep()

Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
---
 kernel/rcutree_plugin.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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Patch

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index 2020e8a..489b1cd 100644
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1237,7 +1237,7 @@  static int rcu_boost(struct rcu_node *rnp)
 				   "rcu_boost_mutex");
 	t->rcu_boost_mutex = &mtx;
 	raw_spin_unlock(&rnp->lock); /* rrupts remain disabled. */
-	rt_mutex_lock(&mtx);  /* Side effect: boosts task t's priority. */
+	rt_mutex_lock_irqdisabled(&mtx);  /* Side effect: boosts task t's priority. */
 	rt_mutex_unlock(&mtx);  /* Keep lockdep happy. */
 	local_irq_restore(flags);