GFS2 always creates buffer_heads during ->write_begin or ->page_mkwrite,
which means mpage_writepage always falls back to block_write_full_page.

So stop calling mpage_writepage and always call block_write_full_page
directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>

Index: linux-2.6/fs/gfs2/aops.c
================================================== =================
--- linux-2.6.orig/fs/gfs2/aops.c 2010-06-07 11:22:42.239273013 +0200
+++ linux-2.6/fs/gfs2/aops.c 2010-06-07 11:23:23.563255580 +0200
@@ -136,10 +136,7 @@ static int gfs2_writeback_writepage(stru
if (ret <= 0)
return ret;

- ret = mpage_writepage(page, gfs2_get_block_noalloc, wbc);
- if (ret == -EAGAIN)
- ret = block_write_full_page(page, gfs2_get_block_noalloc, wbc);
- return ret;
+ return block_write_full_page(page, gfs2_get_block_noalloc, wbc);
}

/**