From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Date: Mon, 22 Dec 2014 18:33:10 +0000 (-0500)
Subject: x86/xen: Remove unnecessary BUG_ON(preemptible()) in xen_setup_timer()
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;ds=sidebyside;h=8b8cd8a3673dd766428aee8222fa8fd3fdd26d58;p=deliverable%2Flinux.git

x86/xen: Remove unnecessary BUG_ON(preemptible()) in xen_setup_timer()

There is no reason for having it and, with commit 250a1ac685f1 ("x86,
smpboot: Remove pointless preempt_disable() in
native_smp_prepare_cpus()"), it prevents HVM guests from booting.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---

diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index f473d268d387..23019b483908 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -458,8 +458,6 @@ void xen_setup_timer(int cpu)
 
 void xen_setup_cpu_clockevents(void)
 {
-	BUG_ON(preemptible());
-
 	clockevents_register_device(this_cpu_ptr(&xen_clock_events.evt));
 }