tree b4133597b6990120a60302cf6b677b463bbc1752
parent 3609e09fd824c37df6f2bf13caa88f6f54a11922
author Vasant Hegde <hegdevasant@linux.vnet.ibm.com> 1407563130 +0530
committer Benjamin Herrenschmidt <benh@kernel.crashing.org> 1407906824 +1000

printk: Add function to return log buffer address and size

Platforms like IBM Power Systems supports service processor
assisted dump. It provides interface to add memory region to
be captured when system is crashed.

During initialization/running we can add kernel memory region
to be collected.

Presently we don't have a way to get the log buffer base address
and size. This patch adds support to return log buffer address
and size.

Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Andrew Morton <akpm@linux-foundation.org>