PM / devfreq: rk3399_dmc: rename driver and internals to rockchip

[firefly-linux-kernel-4.4.55.git] / kernel / cpu.c

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 37731292f8a160581fb1309984ad754effe12306..24ca2963754bb75360ca2859652eb64b39932e6f 100644 (file)
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -185,10 +185,17 @@ void cpu_hotplug_disable(void)
 }
 EXPORT_SYMBOL_GPL(cpu_hotplug_disable);
 
+static void __cpu_hotplug_enable(void)
+{
+       if (WARN_ONCE(!cpu_hotplug_disabled, "Unbalanced cpu hotplug enable\n"))
+               return;
+       cpu_hotplug_disabled--;
+}
+
 void cpu_hotplug_enable(void)
 {
        cpu_maps_update_begin();
-       WARN_ON(--cpu_hotplug_disabled < 0);
+       __cpu_hotplug_enable();
        cpu_maps_update_done();
 }
 EXPORT_SYMBOL_GPL(cpu_hotplug_enable);
@@ -225,12 +232,6 @@ static int cpu_notify(unsigned long val, void *v)
        return __cpu_notify(val, v, -1, NULL);
 }
 
-#ifdef CONFIG_HOTPLUG_CPU
-
-static void cpu_notify_nofail(unsigned long val, void *v)
-{
-       BUG_ON(cpu_notify(val, v));
-}
 EXPORT_SYMBOL(register_cpu_notifier);
 EXPORT_SYMBOL(__register_cpu_notifier);
 
@@ -248,6 +249,12 @@ void __unregister_cpu_notifier(struct notifier_block *nb)
 }
 EXPORT_SYMBOL(__unregister_cpu_notifier);
 
+#ifdef CONFIG_HOTPLUG_CPU
+static void cpu_notify_nofail(unsigned long val, void *v)
+{
+       BUG_ON(cpu_notify(val, v));
+}
+
 /**
  * clear_tasks_mm_cpumask - Safely clear tasks' mm_cpumask for a CPU
  * @cpu: a CPU id
@@ -627,10 +634,11 @@ void __weak arch_enable_nonboot_cpus_end(void)
 void enable_nonboot_cpus(void)
 {
        int cpu, error;
+       struct device *cpu_device;
 
        /* Allow everyone to use the CPU hotplug again */
        cpu_maps_update_begin();
-       WARN_ON(--cpu_hotplug_disabled < 0);
+       __cpu_hotplug_enable();
        if (cpumask_empty(frozen_cpus))
                goto out;
 
@@ -644,6 +652,12 @@ void enable_nonboot_cpus(void)
                trace_suspend_resume(TPS("CPU_ON"), cpu, false);
                if (!error) {
                        pr_info("CPU%d is up\n", cpu);
+                       cpu_device = get_cpu_device(cpu);
+                       if (!cpu_device)
+                               pr_err("%s: failed to get cpu%d device\n",
+                                      __func__, cpu);
+                       else
+                               kobject_uevent(&cpu_device->kobj, KOBJ_ONLINE);
                        continue;
                }
                pr_warn("Error taking CPU%d up: %d\n", cpu, error);