diff --git a/sys/kern/subr_smp.c b/sys/kern/subr_smp.c
--- a/sys/kern/subr_smp.c
+++ b/sys/kern/subr_smp.c
@@ -624,6 +624,19 @@
 	mtx_unlock_spin(&smp_ipi_mtx);
 }
 
+void
+smp_rendezvous_cpu(u_int cpuid,
+	void (* setup_func)(void *),
+	void (* action_func)(void *),
+	void (* teardown_func)(void *),
+	void *arg)
+{
+	cpuset_t set;
+
+	CPU_SETOF(cpuid, &set);
+	smp_rendezvous_cpus(set, setup_func, action_func, teardown_func, arg);
+}
+
 void
 smp_rendezvous(void (* setup_func)(void *), 
 	       void (* action_func)(void *),
diff --git a/sys/sys/smp.h b/sys/sys/smp.h
--- a/sys/sys/smp.h
+++ b/sys/sys/smp.h
@@ -16,6 +16,7 @@
 
 #ifndef LOCORE
 
+#include <sys/types.h>
 #include <sys/cpuset.h>
 #include <sys/queue.h>
 
@@ -278,7 +279,12 @@
 		       void (*)(void *),
 		       void *arg);
 void	smp_rendezvous_cpus(cpuset_t,
-		       void (*)(void *), 
+		       void (*)(void *),
+		       void (*)(void *),
+		       void (*)(void *),
+		       void *arg);
+void	smp_rendezvous_cpu(u_int,
+		       void (*)(void *),
 		       void (*)(void *),
 		       void (*)(void *),
 		       void *arg);