From: Pranith Kumar <bobby.prani@gmail.com>
Date: Thu, 22 Jan 2015 02:26:09 +0000 (-0500)
Subject: powerpc/powernv: Skip registering log region when CONFIG_PRINTK=n
X-Git-Tag: fixes-v4.0-rc1~132^2~24
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6501ab5e380cf25dad85705856bfdde439dbcbd2;p=pandora-kernel.git

powerpc/powernv: Skip registering log region when CONFIG_PRINTK=n

When CONFIG_PRINTK=n, log_buf_addr_get() returns NULL and log_buf_len_get()
return 0. Check for these return values and skip registering the dump buffer.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Reviewed-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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