X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=kernel%2Fsoftirq.c;h=336f92d64e2ec04bb56d7146a4fc1e1eeb1141f5;hb=d374c1c1281d6188a0d0676172b1c0e3de35c6e7;hp=ad3295cdded55032f248bf53dc6b908c56702581;hpb=dad2ad82c5f058367df79de022bd12d36afcd065;p=firefly-linux-kernel-4.4.55.git

diff --git a/kernel/softirq.c b/kernel/softirq.c
index ad3295cdded5..336f92d64e2e 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -16,6 +16,7 @@
 #include <linux/cpu.h>
 #include <linux/kthread.h>
 #include <linux/rcupdate.h>
+#include <linux/smp.h>
 
 #include <asm/irq.h>
 /*
@@ -445,7 +446,7 @@ static void takeover_tasklets(unsigned int cpu)
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int __devinit cpu_callback(struct notifier_block *nfb,
+static int cpu_callback(struct notifier_block *nfb,
 				  unsigned long action,
 				  void *hcpu)
 {
@@ -483,7 +484,7 @@ static int __devinit cpu_callback(struct notifier_block *nfb,
 	return NOTIFY_OK;
 }
 
-static struct notifier_block __devinitdata cpu_nfb = {
+static struct notifier_block cpu_nfb = {
 	.notifier_call = cpu_callback
 };
 
@@ -495,3 +496,22 @@ __init int spawn_ksoftirqd(void)
 	register_cpu_notifier(&cpu_nfb);
 	return 0;
 }
+
+#ifdef CONFIG_SMP
+/*
+ * Call a function on all processors
+ */
+int on_each_cpu(void (*func) (void *info), void *info, int retry, int wait)
+{
+	int ret = 0;
+
+	preempt_disable();
+	ret = smp_call_function(func, info, retry, wait);
+	local_irq_disable();
+	func(info);
+	local_irq_enable();
+	preempt_enable();
+	return ret;
+}
+EXPORT_SYMBOL(on_each_cpu);
+#endif