From b0aad7a99c1df90c23ff4bac76eea9cf25049e9e Mon Sep 17 00:00:00 2001
From: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Date: Fri, 16 Aug 2013 13:53:10 -0700
Subject: [PATCH] pstore: Add compression support to pstore

Add compression support to pstore which will help in capturing more data.
Initially, pstore will make a call to kmsg_dump with a bigger buffer
and will pass the size of bigger buffer to kmsg_dump and then compress
the data to registered buffer of registered size.

In case compression fails, pstore will capture the uncompressed
data by making a call again to kmsg_dump with registered_buffer
of registered size.

Pstore will indicate the data is compressed or not with a flag
in the write callback.

Signed-off-by: Aruna Balakrishnaiah <aruna@linux.vnet.ibm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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