From: Tony Luck <tony.luck@intel.com>
Date: Wed, 23 May 2012 21:14:22 +0000 (-0700)
Subject: x86/mce: Fix check for processor context when machine check was taken.
X-Git-Tag: v3.5-rc1~75^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=875e26648cf9b6db9d8dc07b7959d7c61fb3f49c;p=pandora-kernel.git

x86/mce: Fix check for processor context when machine check was taken.

Linus pointed out that there was no value is checking whether m->ip
was zero - because zero is a legimate value.  If we have a reliable
(or faked in the VM86 case) "m->cs" we can use it to tell whether we
were in user mode or kernelwhen the machine check hit.

Reported-by: Linus Torvalds <torvalds@linuxfoundation.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

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