From: Gautham R Shenoy <ego@in.ibm.com>
Date: Fri, 19 Oct 2007 06:40:47 +0000 (-0700)
Subject: Add irq protection in the percpu-counters cpu-hotplug-callback path
X-Git-Tag: v2.6.24-rc1~172
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d2b20b11547cefc89d6c81937e81afaf3c62808b;p=pandora-kernel.git

Add irq protection in the percpu-counters cpu-hotplug-callback path

Some of the per-cpu counters and thus their locks are accessed from IRQ
contexts.  This can cause a deadlock if it interrupts a cpu-offline thread
which is transferring a dead-cpu's counts to the global counter.

Add appropriate IRQ protection in the cpu-hotplug callback path.

Signed-off-by: Gautham R Shenoy <ego@in.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

Reading git-diff-tree failed