From: Mark Salyzyn <salyzyn@android.com>
Date: Sat, 17 Jan 2015 00:01:10 +0000 (-0800)
Subject: pstore: Add pmsg - user-space accessible pstore object
X-Git-Tag: fixes-v4.0-rc1~135^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9d5438f462abd6398cdb7b3211bdcec271873a3b;p=pandora-kernel.git

pstore: Add pmsg - user-space accessible pstore object

A secured user-space accessible pstore object. Writes
to /dev/pmsg0 are appended to the buffer, on reboot
the persistent contents are available in
/sys/fs/pstore/pmsg-ramoops-[ID].

One possible use is syslogd, or other daemon, can
write messages, then on reboot provides a means to
triage user-space activities leading up to a panic
as a companion to the pstore dmesg or console logs.

Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
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