cpu: Register a generic CPU device on architectures that currently do not

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / base / cpu.c

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index bba70d08be6a6b072d3d07545e694d8983bf3aff..db87e78d745940a3ba19332799930057edfd0615 100644 (file)
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -11,6 +11,7 @@
 #include <linux/device.h>
 #include <linux/node.h>
 #include <linux/gfp.h>
+#include <linux/percpu.h>
 
 #include "base.h"
 
@@ -275,11 +276,29 @@ bool cpu_is_hotpluggable(unsigned cpu)
 }
 EXPORT_SYMBOL_GPL(cpu_is_hotpluggable);
 
+#ifdef CONFIG_GENERIC_CPU_DEVICES
+static DEFINE_PER_CPU(struct cpu, cpu_devices);
+#endif
+
+static void __init cpu_dev_register_generic(void)
+{
+#ifdef CONFIG_GENERIC_CPU_DEVICES
+       int i;
+
+       for_each_possible_cpu(i) {
+               if (register_cpu(&per_cpu(cpu_devices, i), i))
+                       panic("Failed to register CPU device");
+       }
+#endif
+}
+
 void __init cpu_dev_init(void)
 {
        if (subsys_system_register(&cpu_subsys, cpu_root_attr_groups))
                panic("Failed to register CPU subsystem");
 
+       cpu_dev_register_generic();
+
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
        sched_create_sysfs_power_savings_entries(cpu_subsys.dev_root);
 #endif