From e036bd330d21e929e94ed4d5432f9d279b19ce47 Mon Sep 17 00:00:00 2001
From: Ben Zhang <benzh@chromium.org>
Date: Thu, 21 May 2015 09:50:34 -0700
Subject: [PATCH] pstore/ram: verify ramoops header before saving record

On some devices the persistent memory contains junk after a cold boot,
and /dev/pstore/dmesg-ramoops-* are created with random data which is
not the result of a kernel crash.

This patch adds a ramoops header check and skips any
persistent_ram_zone that does not have a valid header.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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