From: Eric Dumazet <dada1@cosmosbay.com>
Date: Tue, 2 Dec 2008 07:37:17 +0000 (-0800)
Subject: net: percpu_counter_inc() should not be called in BH-disabled section
X-Git-Tag: v2.6.29-rc1~581^2~348
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6976a1d6c222c50ac93d2273b9cf57e6fd047e59;p=pandora-kernel.git

net: percpu_counter_inc() should not be called in BH-disabled section

Based upon a lockdep report by Alexey Dobriyan.

I checked all per_cpu_counter_xxx() usages in network tree, and I
think all call sites are BH enabled except one in
inet_csk_listen_stop().

commit dd24c00191d5e4a1ae896aafe33c6b8095ab4bd1
(net: Use a percpu_counter for orphan_count)
replaced atomic_t orphan_count to a percpu_counter.

atomic_inc()/atomic_dec() can be called from any context, while
percpu_counter_xxx() should be called from a consistent state.

For orphan_count, this context can be the BH-enabled one.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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