linux-kernel - [PATCH RFC 09/11] Adopt rcu_read

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Date:	Sun, 14 Mar 2010 19:38:46 +0900
From:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
To:	fweisbec@...il.com
Cc:	linux-kernel@...r.kernel.org, mitake@....info.waseda.ac.jp,
	h.mitake@...il.com, Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jens Axboe <jens.axboe@...cle.com>,
	Jason Baron <jbaron@...hat.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: [PATCH RFC 09/11] Adopt rcu_read_lock() to lock monitor

rcu_read_lock() issues lock_acquire() and rcu_read_unlock() issues lock_release().
They don't lock actual locks like spinlock or mutex.

So I replaced these calling of lock_acquire() and lock_release() with
lockdep_acquire() and lockdep_release().

Signed-off-by: Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jens Axboe <jens.axboe@...cle.com>
Cc: Jason Baron <jbaron@...hat.com>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 include/linux/rcupdate.h |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index 24440f4..e45c223 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -80,8 +80,8 @@ extern void rcu_init(void);
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 extern struct lockdep_map rcu_lock_map;
 # define rcu_read_acquire()	\
-			lock_acquire(&rcu_lock_map, 0, 0, 2, 1, NULL, _THIS_IP_)
-# define rcu_read_release()	lock_release(&rcu_lock_map, 1, _THIS_IP_)
+			lockdep_acquire(&rcu_lock_map, 0, 0, 2, 1, NULL, _THIS_IP_)
+# define rcu_read_release()	lockdep_release(&rcu_lock_map, 1, _THIS_IP_)
 #else
 # define rcu_read_acquire()	do { } while (0)
 # define rcu_read_release()	do { } while (0)
-- 
1.6.5.2

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