The #define is missing from the include guard idiom.

Signed-off-by: Rasmus Villemoes <[email protected]>
---
 arch/x86/xen/smp.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/xen/smp.h b/arch/x86/xen/smp.h
index c7c2d89..b4f1561 100644
--- a/arch/x86/xen/smp.h
+++ b/arch/x86/xen/smp.h
@@ -1,4 +1,5 @@
 #ifndef _XEN_SMP_H
+#define _XEN_SMP_H
 
 extern void xen_send_IPI_mask(const struct cpumask *mask,
                              int vector);
-- 
1.9.2

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