pps: simplify conditions a bit

[~andy/linux] / kernel / smp.c

diff --git a/kernel/smp.c b/kernel/smp.c
index ed6aacfcb7efb307fe313ea798e7074f2c8f4f92..4ec30e0699878d2f536df9ee6ce94d765f046403 100644 (file)
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -13,6 +13,7 @@
 #include <linux/smp.h>
 #include <linux/cpu.h>
 
+#ifdef CONFIG_USE_GENERIC_SMP_HELPERS
 static struct {
        struct list_head        queue;
        raw_spinlock_t          lock;
@@ -267,7 +268,7 @@ static DEFINE_PER_CPU_SHARED_ALIGNED(struct call_single_data, csd_data);
  *
  * 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 +337,7 @@ EXPORT_SYMBOL(smp_call_function_single);
  *     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 +417,7 @@ void __smp_call_function_single(int cpu, struct call_single_data *data,
  * 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 +501,7 @@ EXPORT_SYMBOL(smp_call_function_many);
  * 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);
@@ -529,3 +530,21 @@ void ipi_call_unlock_irq(void)
 {
        raw_spin_unlock_irq(&call_function.lock);
 }
+#endif /* USE_GENERIC_SMP_HELPERS */
+
+/*
+ * Call a function on all processors
+ */
+int on_each_cpu(void (*func) (void *info), void *info, int wait)
+{
+       int ret = 0;
+
+       preempt_disable();
+       ret = smp_call_function(func, info, wait);
+       local_irq_disable();
+       func(info);
+       local_irq_enable();
+       preempt_enable();
+       return ret;
+}
+EXPORT_SYMBOL(on_each_cpu);