From: Christoph Hellwig <hch@lst.de>
Date: Tue, 11 Sep 2007 00:02:32 +0000 (-0400)
Subject: Btrfs: [PATCH] extent_map: make the writepage_io hook optional
X-Git-Tag: v2.6.29-rc1~27^2~9^2~55^2~56^2~30^2~492
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b06355f0fe04a62d08238438654ec453e05304ba;p=pandora-kernel.git

Btrfs: [PATCH] extent_map: make the writepage_io hook optional

The writepage_io is not mandatory, e.g. my port of xfs to the extent_map
code does not have one for now.  So handle a NULL pointer gracefully
here.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

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