From: Brian Gerst <brgerst@gmail.com>
Date: Mon, 20 Jul 2015 01:09:05 +0000 (-0400)
Subject: x86/entry/vm86: Preserve 'orig_ax'
X-Git-Tag: omap-for-v4.3/fixes-merge-window~19^2~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df1ae9a5dc66d9fd57109240042372b1065d984a;p=pandora-kernel.git

x86/entry/vm86: Preserve 'orig_ax'

There is no legitimate reason for usermode to modify the 'orig_ax'
field on entry to vm86 mode, so copy it from the 32-bit regs.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1437354550-25858-3-git-send-email-brgerst@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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