On Wed, May 18, 2011 at 05:18:00PM +0200, Jan Kara wrote:

Create __block_page_mkwrite() helper which does all what block_page_mkwrite()
does except that it passes back errors from __block_write_begin /
block_commit_write calls.

Looks good to me.  Long term I wonder wether we should force
->page_mkwrite to always return the page locked and just use normal
errnos all the way up to do_wp_page, but that can be left for a later
iteration as it would be quite invasive.

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