From: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Date: Thu, 28 Mar 2013 08:15:35 +0000 (+0800)
Subject: sysfs: Add crash_notes_size to export percpu note size
X-Git-Tag: omap-for-v3.10/dt-fixes-for-merge-window~138^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eca4549f57a19f8881dcd7b9cef719b3452003c0;p=pandora-kernel.git

sysfs: Add crash_notes_size to export percpu note size

For percpu notes, we are exporting only address and not size. So
the userspace tool kexec-tools is putting an upper limit of 1024
and putting the value in p_memsz and p_filesz fields. So the patch
add the new sysfile crash_notes_size to export the exact percpu
note size and let the kexec-tools parse it intead of using 1024.

The idea came from Vivek Goyal. And a later patch will be sent to
kexec-tools to let it parse the size.

Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Acked-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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