tree 9093681b9b452e62a95805b3e00c2c46eef3d50f
parent 5404a7f1c21cfda061712bedf2d06cc0f6c755e9
author Matthew Wilcox <willy@infradead.org> 1541527917 -0500
committer Matthew Wilcox <willy@infradead.org> 1542404329 -0500

dax: Remove optimisation from dax_lock_mapping_entry

Skipping some of the revalidation after we sleep can lead to returning
a mapping which has already been freed.  Just drop this optimisation.

Reported-by: Dan Williams <dan.j.williams@intel.com>
Fixes: 9f32d221301c ("dax: Convert dax_lock_mapping_entry to XArray")
Signed-off-by: Matthew Wilcox <willy@infradead.org>