On Tue, Sep 27, 2016 at 06:08:09PM +0200, Jan Kara wrote:
> Use vm_fault structure to pass cow_page, page, and entry in and out of
> the function. That reduces number of __do_fault() arguments from 4 to 1.
> Signed-off-by: Jan Kara <j...@suse.cz>

In looking at this I realized that vmf->entry is actually unused, as is the
entry we used to return back via __do_fault().  I guess they must have been in
there because at one point they were needed for dax_unlock_mapping_entry()?
Anyway, looking ahead I see patch 10 removes vmf->entry altogether. :)

Reviewed-by: Ross Zwisler <ross.zwis...@linux.intel.com>
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