x86/entry/vm86: Preserve 'orig_ax'
authorBrian Gerst <brgerst@gmail.com>
Mon, 20 Jul 2015 01:09:05 +0000 (21:09 -0400)
committerIngo Molnar <mingo@kernel.org>
Tue, 21 Jul 2015 07:12:23 +0000 (09:12 +0200)
commitdf1ae9a5dc66d9fd57109240042372b1065d984a
treec14e5d065f2fae8c8b6df252761dfe7e7313b332
parent0233606ce5cf12c1a0e27cb197066ea5bc2bb488
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>
arch/x86/kernel/vm86_32.c