[PATCH] Define smp_call_function_mask() on uniprocessor builds

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Rather than #ifdef users of smp_call_function_mask(), define it as an
empty macro to avoid build errors.  The function explicitly prohibits
callers from specifying the current cpu, so nothing needs to be done.

This unbreaks uniprocessor KVM builds.

Signed-off-by: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>

diff --git a/include/linux/smp.h b/include/linux/smp.h
index 259a13c..24e2e31 100644
--- a/include/linux/smp.h
+++ b/include/linux/smp.h
@@ -108,6 +108,9 @@ static inline void smp_send_reschedule(int cpu) { }
 	0;			\
 })
 
+#define smp_call_function_mask(mask, func, info, wait) \
+	do { (void)(mask); (void)(func); (void)(info); (void)(wait); } while (0)
+
 #endif /* !SMP */
 
 /*

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