From 0a4e6be9ca17c54817cf814b4b5aa60478c6df27 Mon Sep 17 00:00:00 2001
From: Marcelo Tosatti <mtosatti@redhat.com>
Date: Mon, 23 Mar 2015 20:21:51 -0300
Subject: [PATCH] x86: kvm: Revert "remove sched notifier for cross-cpu
 migrations"

The following point:

    2. per-CPU pvclock time info is updated if the
       underlying CPU changes.

Is not true anymore since "KVM: x86: update pvclock area conditionally,
on cpu migration".

Add task migration notification back.

Problem noticed by Andy Lutomirski.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
CC: stable@kernel.org # 3.11+
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Reading git-format-patch failed