From: Glauber Costa <glommer@parallels.com>
Date: Fri, 16 Dec 2011 00:51:59 +0000 (+0000)
Subject: net: fix sleeping while atomic problem in sock mem_cgroup.
X-Git-Tag: v3.3-rc1~182^2~187
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=36b77a52087a9fca4228c06e0730750f9b6468f0;p=pandora-kernel.git

net: fix sleeping while atomic problem in sock mem_cgroup.

We can't scan the proto_list to initialize sock cgroups, as it
holds a rwlock, and we also want to keep the code generic enough to
avoid calling the initialization functions of protocols directly,

Convert proto_list_lock into a mutex, so we can sleep and do the
necessary allocations. This lock is seldom taken, so there shouldn't
be any performance penalties associated with that

Signed-off-by: Glauber Costa <glommer@parallels.com>
CC: Hiroyouki Kamezawa <kamezawa.hiroyu@jp.fujitsu.com>
CC: David S. Miller <davem@davemloft.net>
CC: Eric Dumazet <eric.dumazet@gmail.com>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
CC: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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