tree c4644ab4b8b12d2c6100fb47c7dfa4c5949107ca
parent 89f3b363967a958e756a549c8747c1fb9c930c1a
author Christoph Hellwig <hch@infradead.org> 1277336761 +1000
committer Alex Elder <aelder@sgi.com> 1280168201 -0500

xfs: simplify xfs_vm_writepage

The writepage implementation in XFS still tries to deal with dirty but
unmapped buffers which used to caused by writes through shared mmaps.  Since
the introduction of ->page_mkwrite these can't happen anymore, so remove the
code dealing with them.

Note that the all_bh variable which causes us to start I/O on all buffers on
the pages was controlled by the count of unmapped buffers, which also
included those not actually dirty.  It's now unconditionally initialized to
0 but set to 1 for the case of small file size extensions.  It probably can
be removed entirely, but that's left for another patch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>