tree cc1b4d38e5ebd88c25b2bcee684c9e882be9a2ac
parent fe102c71a65a503646bcc94ccb6859da613c2f4f
author Eric Dumazet <dada1@cosmosbay.com> 1228857251 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1228924912 -0800

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>