cpumask: arch_send_call_function_ipi_mask: s390

We're weaning the core code off handing cpumask's around on-stack.
This introduces arch_send_call_function_ipi_mask().

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index b4b6396..c932caa 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -147,11 +147,11 @@
 		udelay(10);
 }
 
-void arch_send_call_function_ipi(cpumask_t mask)
+void arch_send_call_function_ipi_mask(const struct cpumask *mask)
 {
 	int cpu;
 
-	for_each_cpu_mask(cpu, mask)
+	for_each_cpu(cpu, mask)
 		smp_ext_bitcall(cpu, ec_call_function);
 }