From: Dario Faggioli <dario.faggioli@citrix.com>
Date: Mon, 12 Oct 2015 15:22:02 +0000 (+0200)
Subject: cpufreq: fix notifier block double registration
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~2395
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=4930444bdf33157763ade5dd959b9a2a7477e0a3;p=xen.git

cpufreq: fix notifier block double registration

As a consequence of commit 49388f11d512bb92706ce
("x86/cpufreq: relocate the driver register function")
the cpufreq CPU notifier was being registered twice.
That resulted in bugs when trying to offline a
CPU, as reported here:

 https://www.mail-archive.com/xen-devel@lists.xen.org/msg41618.html

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
---

diff --git a/xen/drivers/cpufreq/cpufreq.c b/xen/drivers/cpufreq/cpufreq.c
index 81a187ba59..6e666e415d 100644
--- a/xen/drivers/cpufreq/cpufreq.c
+++ b/xen/drivers/cpufreq/cpufreq.c
@@ -650,6 +650,5 @@ int __init cpufreq_register_driver(struct cpufreq_driver *driver_data)
 
     cpufreq_driver = driver_data;
 
-    register_cpu_notifier(&cpu_nfb);
     return 0;
 }