[tip:smp/hotplug] xen/x86: Define stubs for xen_smp_intr_init/xen_smp_intr_free

[tip-bot for Boris Ostrovsky]

Commit-ID:  854e9fa5a56a9771fad4701a427e4844d2cbade1
Gitweb:     http://git.kernel.org/tip/854e9fa5a56a9771fad4701a427e4844d2cbade1
Author:     Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
AuthorDate: Mon, 25 Jul 2016 17:14:48 -0400
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 27 Jul 2016 12:38:08 +0200

xen/x86: Define stubs for xen_smp_intr_init/xen_smp_intr_free

xen_smp_intr_init() and xen_smp_intr_free() are now called from
enlighten.c and therefore not guaranteed to have CONFIG_SMP.

Instead of adding multiple ifdefs there provide stubs in smp.h

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Reviewed-by: jgross@xxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Cc: david.vrabel@xxxxxxxxxx
Link: http://lkml.kernel.org/r/1469481288-2378-1-git-send-email-boris.ostrovsky@xxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

---
 arch/x86/xen/smp.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index 45faaf3..a1918d8 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -1,5 +1,6 @@
 #ifndef _XEN_SMP_H
 
+#ifdef CONFIG_SMP
 extern void xen_send_IPI_mask(const struct cpumask *mask,
 			      int vector);
 extern void xen_send_IPI_mask_allbutself(const struct cpumask *mask,
@@ -19,4 +20,12 @@ static inline void xen_pvh_early_cpu_init(int cpu, bool entry)
 }
 #endif
 
+#else /* CONFIG_SMP */
+static inline int xen_smp_intr_init(unsigned int cpu)
+{
+	return 0;
+}
+static inline void xen_smp_intr_free(unsigned int cpu) {}
+#endif /* CONFIG_SMP */
+
 #endif