From: Oleg Nesterov <oleg@redhat.com>
Date: Tue, 2 Sep 2014 17:57:17 +0000 (+0200)
Subject: x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable()
X-Git-Tag: fixes-against-v3.18-rc2~90^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df24fb859a4e200d9324e2974229fbb7adf00aef;p=pandora-kernel.git

x86, fpu: __restore_xstate_sig()->math_state_restore() needs preempt_disable()

Add preempt_disable() + preempt_enable() around math_state_restore() in
__restore_xstate_sig(). Otherwise __switch_to() after __thread_fpu_begin()
can overwrite fpu->state we are going to restore.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Link: http://lkml.kernel.org/r/20140902175717.GA21649@redhat.com
Cc: <stable@vger.kernel.org> # v3.7+
Reviewed-by: Suresh Siddha <sbsiddha@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
---

Reading git-diff-tree failed