From: Yong Zhang <yong.zhang0@gmail.com>
To: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
Cc: linux-kernel@vger.kernel.org, mingo@elte.hu,
laijs@cn.fujitsu.com, dipankar@in.ibm.com,
akpm@linux-foundation.org, mathieu.desnoyers@polymtl.ca,
josh@joshtriplett.org, niv@us.ibm.com, tglx@linutronix.de,
peterz@infradead.org, rostedt@goodmis.org,
Valdis.Kletnieks@vt.edu, dhowells@redhat.com,
eric.dumazet@gmail.com, darren@dvhart.com, patches@linaro.org
Subject: [PATCH 3/3] rcu: use rt_mutex_lock_irqdisabled() in rcu_boost()
Date: Tue, 6 Dec 2011 11:29:33 +0800 [thread overview]
Message-ID: <20111206032933.GC17091@zhy> (raw)
In-Reply-To: <20111206021227.GO2326@linux.vnet.ibm.com>
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(-)
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);
--
1.7.5.4
next prev parent reply other threads:[~2011-12-06 3:29 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-03 18:34 [PATCH tip/core/rcu 0/7] Preview of fourth set of RCU changes for 3.3 Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 1/7] rcu: Don't check irq nesting from rcu idle entry/exit Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 2/7] rcu: Irq nesting is always 0 on rcu_enter_idle_common Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 3/7] rcu: Keep invoking callbacks if CPU otherwise idle Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 4/7] rcu: Adaptive dyntick-idle preparation Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 5/7] rcu: remove redundant rcu_cpu_stall_suppress declaration Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 6/7] driver-core/cpu: Add cpu_is_hotpluggable() for rcutorture error analysis Paul E. McKenney
2011-12-03 21:06 ` Josh Triplett
2011-12-03 23:14 ` Paul E. McKenney
2011-12-03 18:34 ` [PATCH RFC tip/core/rcu 7/7] rcu: Quiet RCU-lockdep warnings involving interrupt disabling Paul E. McKenney
2011-12-05 9:19 ` Yong Zhang
2011-12-05 16:45 ` Paul E. McKenney
2011-12-06 1:26 ` Yong Zhang
2011-12-06 2:12 ` Paul E. McKenney
2011-12-06 3:27 ` [PATCH 1/3] kernel.h: sched: introduce might_sleep_disabled() Yong Zhang
2011-12-06 3:28 ` [PATCH 2/3] rtmutex: introduce rt_mutex_lock_irqdisabled() Yong Zhang
2011-12-06 3:29 ` Yong Zhang [this message]
2011-12-06 9:52 ` [PATCH RFC tip/core/rcu 7/7] rcu: Quiet RCU-lockdep warnings involving interrupt disabling Peter Zijlstra
2011-12-06 10:05 ` Yong Zhang
2011-12-06 10:32 ` Peter Zijlstra
2011-12-06 12:26 ` Steven Rostedt
2011-12-06 16:04 ` Paul E. McKenney
2011-12-06 16:33 ` Paul E. McKenney
2011-12-06 16:56 ` Steven Rostedt
2011-12-06 17:16 ` Paul E. McKenney
2011-12-06 10:27 ` Peter Zijlstra
2011-12-06 16:11 ` Paul E. McKenney
2011-12-06 16:14 ` Peter Zijlstra
2011-12-06 16:01 ` Paul E. McKenney
2011-12-05 9:41 ` Peter Zijlstra
2011-12-05 10:03 ` Yong Zhang
2011-12-05 16:48 ` Paul E. McKenney
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