Typedef SMP call function pointer

Typedef the pointer to the function to be called by smp_call_function() and
friends:

	typedef void (*smp_call_func_t)(void *info);

as it is used in a fair number of places.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: linux-arch@vger.kernel.org
diff --git a/kernel/smp.c b/kernel/smp.c
index ed6aacf..12ed8b0 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -267,7 +267,7 @@
  *
  * Returns 0 on success, else a negative status code.
  */
-int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+int smp_call_function_single(int cpu, smp_call_func_t func, void *info,
 			     int wait)
 {
 	struct call_single_data d = {
@@ -336,7 +336,7 @@
  *	3) any other online cpu in @mask
  */
 int smp_call_function_any(const struct cpumask *mask,
-			  void (*func)(void *info), void *info, int wait)
+			  smp_call_func_t func, void *info, int wait)
 {
 	unsigned int cpu;
 	const struct cpumask *nodemask;
@@ -416,7 +416,7 @@
  * must be disabled when calling this function.
  */
 void smp_call_function_many(const struct cpumask *mask,
-			    void (*func)(void *), void *info, bool wait)
+			    smp_call_func_t func, void *info, bool wait)
 {
 	struct call_function_data *data;
 	unsigned long flags;
@@ -500,7 +500,7 @@
  * You must not call this function with disabled interrupts or from a
  * hardware interrupt handler or from a bottom half handler.
  */
-int smp_call_function(void (*func)(void *), void *info, int wait)
+int smp_call_function(smp_call_func_t func, void *info, int wait)
 {
 	preempt_disable();
 	smp_call_function_many(cpu_online_mask, func, info, wait);