linux-kernel - [ 016/117] ARM: xen: only set pm function ptrs for Xen guests

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Date:	Tue, 24 Sep 2013 17:18:02 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Rob Herring <rob.herring@...xeda.com>,
	Stefano Stabellini <stefano.stabellini@...citrix.com>
Subject: [ 016/117] ARM: xen: only set pm function ptrs for Xen guests

3.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Rob Herring <rob.herring@...xeda.com>

commit 9dd4b2944c46e1fdbd0a516c221c8a2670cbf005 upstream.

xen_pm_init was unconditionally setting pm_power_off and arm_pm_restart
function pointers. This breaks multi-platform kernels. Make this
conditional on running as a Xen guest and make it a late_initcall to
ensure it is setup after platform code for Dom0.

Signed-off-by: Rob Herring <rob.herring@...xeda.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/arm/xen/enlighten.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -273,12 +273,15 @@ core_initcall(xen_guest_init);
 
 static int __init xen_pm_init(void)
 {
+	if (!xen_domain())
+		return -ENODEV;
+
 	pm_power_off = xen_power_off;
 	arm_pm_restart = xen_restart;
 
 	return 0;
 }
-subsys_initcall(xen_pm_init);
+late_initcall(xen_pm_init);
 
 static irqreturn_t xen_arm_callback(int irq, void *arg)
 {


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