From bf2883339a33b7544b92ea465b90c3de55082032 Mon Sep 17 00:00:00 2001
From: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Date: Tue, 25 Jun 2013 14:33:56 +0530
Subject: [PATCH] pstore: Fail to unlink if a driver has not defined
 pstore_erase

pstore_erase is used to erase the record from the persistent store.
So if a driver has not defined pstore_erase callback return
-EPERM instead of unlinking a file as deleting the file without
erasing its record in persistent store will give a wrong impression
to customers.

Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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Reading git-format-patch failed