linux-kernel - [PATCH tip/core/rcu 0/2] rcu: lastcomp cleanups, fix rcu

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Message-ID: <20091114035100.GA9599@linux.vnet.ibm.com>
Date:	Fri, 13 Nov 2009 19:51:00 -0800
From:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	mingo@...e.hu, laijs@...fujitsu.com, dipankar@...ibm.com,
	akpm@...ux-foundation.org, mathieu.desnoyers@...ymtl.ca,
	josh@...htriplett.org, dvhltc@...ibm.com, niv@...ibm.com,
	tglx@...utronix.de, peterz@...radead.org, rostedt@...dmis.org,
	Valdis.Kletnieks@...edu, dhowells@...hat.com
Subject: [PATCH tip/core/rcu 0/2] rcu: lastcomp cleanups, fix rcu_pending()
	false positives

These two patches are yet more from the ongoing cleanup/inspection
session for RCU.

1.	Get the (hopefully) last of the accesses to the ->completed
	fields cleaned up.

2.	Fix a race in __rcu_pending() accesses to ->gpnum and
	->completed fields that could cause needless (but otherwise
	harmless) raising of RCU_SOFTIRQ.
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