From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Thu, 10 Dec 2009 14:05:55 +0000 (-0500)
Subject: NFS: Fix nfs_migrate_page()
X-Git-Tag: v2.6.33-rc1~287^2^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=190f38e5cedc910940b1da9015f00458c18f97b4;p=pandora-kernel.git

NFS: Fix nfs_migrate_page()

The call to migrate_page() will cause the page->private field to be
cleared.
Also fix up the locking around the page->private transfer, so that we ensure
that calls to nfs_page_find_request() don't end up racing.

Finally, fix up a double free bug: nfs_unlock_request() already calls
nfs_release_request() for us...

Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Tested-by: Andi Kleen <andi@firstfloor.org>
Cc: stable@kernel.org
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
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