From: Eric Dumazet <dada1@cosmosbay.com>
Date: Tue, 9 Dec 2008 21:14:11 +0000 (-0800)
Subject: percpu_counter: fix CPU unplug race in percpu_counter_destroy()
X-Git-Tag: v2.6.28-rc8~29
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd3d664fef97cf01f8e28fe0b024ad52f3bbc1bc;p=pandora-kernel.git

percpu_counter: fix CPU unplug race in percpu_counter_destroy()

We should first delete the counter from percpu_counters list
before freeing memory, or a percpu_counter_hotcpu_callback()
could dereference a NULL pointer.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Acked-by: David S. Miller <davem@davemloft.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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