From: Oleg Nesterov <oleg@tv-sign.ru>
Date: Wed, 13 Sep 2006 03:35:55 +0000 (-0700)
Subject: [PATCH] rcu_do_batch: make ->qlen decrement irq safe
X-Git-Tag: v2.6.18~13^2~18
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd9daa221e77f642954849a795fa7c59533a9b2f;p=pandora-kernel.git

[PATCH] rcu_do_batch: make ->qlen decrement irq safe

rcu_do_batch() decrements rdp->qlen with irqs enabled.  This is not good,
it can also be modified by call_rcu() from interrupt.

Decrement ->qlen once with irqs disabled, after a main loop.

Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Dipankar Sarma <dipankar@in.ibm.com>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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