From: Peng Tao <bergwolf@gmail.com>
Date: Thu, 12 Jan 2012 15:18:41 +0000 (+0800)
Subject: pnfsblock: acquire im_lock in _preload_range
X-Git-Tag: v3.3-rc1~41^2~8
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39e567ae36fe03c2b446e1b83ee3d39bea08f90b;p=pandora-kernel.git

pnfsblock: acquire im_lock in _preload_range

When calling _add_entry, we should take the im_lock to protect
agains other modifiers.

Cc: <stable@vger.kernel.org> #3.1+
Signed-off-by: Peng Tao <peng_tao@emc.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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