From: Peng Tao <bergwolf@gmail.com>
Date: Thu, 23 Aug 2012 16:27:51 +0000 (+0800)
Subject: pnfsblock: fix partial page buffer wirte
X-Git-Tag: v3.7-rc1~58^2~37
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fe6e1e8d9fad86873eb74a26e80a8f91f9e870b5;p=pandora-kernel.git

pnfsblock: fix partial page buffer wirte

If applications use flock to protect its write range, generic NFS
will not do read-modify-write cycle at page cache level. Therefore
LD should know how to handle non-sector aligned writes. Otherwise
there will be data corruption.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Peng Tao <tao.peng@emc.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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