From: Richard Kennedy <richard@rsk.demon.co.uk>
Date: Fri, 25 Dec 2009 20:46:07 +0000 (-0500)
Subject: ext4: return correct wbc.nr_to_write in ext4_da_writepages
X-Git-Tag: v2.6.33-rc3~34^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2faf2e19dd0e060eeb32442858ef495ac3083277;p=pandora-kernel.git

ext4: return correct wbc.nr_to_write in ext4_da_writepages

When ext4_da_writepages increases the nr_to_write in writeback_control
then it must always re-base the return value.  Originally there was a
(misguided) attempt prevent wbc.nr_to_write from going negative.  In
fact, it's necessary to allow nr_to_write to be negative so that
wb_writeback() can correctly calculate how many pages were actually
written.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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