Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[cascardo/linux.git] / kernel / softirq.c

diff --git a/kernel/softirq.c b/kernel/softirq.c
index 8ed90e3..6676264 100644 (file)
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -714,7 +714,7 @@ void tasklet_kill_immediate(struct tasklet_struct *t, unsigned int cpu)
        BUG();
 }
 
-static void takeover_tasklets(unsigned int cpu)
+static int takeover_tasklets(unsigned int cpu)
 {
        /* CPU is dead, so no lock needed. */
        local_irq_disable();
@@ -737,27 +737,12 @@ static void takeover_tasklets(unsigned int cpu)
        raise_softirq_irqoff(HI_SOFTIRQ);
 
        local_irq_enable();
+       return 0;
 }
+#else
+#define takeover_tasklets      NULL
 #endif /* CONFIG_HOTPLUG_CPU */
 
-static int cpu_callback(struct notifier_block *nfb, unsigned long action,
-                       void *hcpu)
-{
-       switch (action) {
-#ifdef CONFIG_HOTPLUG_CPU
-       case CPU_DEAD:
-       case CPU_DEAD_FROZEN:
-               takeover_tasklets((unsigned long)hcpu);
-               break;
-#endif /* CONFIG_HOTPLUG_CPU */
-       }
-       return NOTIFY_OK;
-}
-
-static struct notifier_block cpu_nfb = {
-       .notifier_call = cpu_callback
-};
-
 static struct smp_hotplug_thread softirq_threads = {
        .store                  = &ksoftirqd,
        .thread_should_run      = ksoftirqd_should_run,
@@ -767,8 +752,8 @@ static struct smp_hotplug_thread softirq_threads = {
 
 static __init int spawn_ksoftirqd(void)
 {
-       register_cpu_notifier(&cpu_nfb);
-
+       cpuhp_setup_state_nocalls(CPUHP_SOFTIRQ_DEAD, "softirq:dead", NULL,
+                                 takeover_tasklets);
        BUG_ON(smpboot_register_percpu_thread(&softirq_threads));
 
        return 0;