cpu: Do not return errors from cpu_dev_init() which will be ignored

cpu_dev_init() is only called from driver_init(), which does not check
its return value.  Therefore make cpu_dev_init() return void.

We must register the CPU subsystem, so panic if this fails.

If sched_create_sysfs_power_savings_entries() fails, the damage is
contained, so ignore this (as before).

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 8 deletions

diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 9a5578efbc93..bba70d08be6a 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -2,6 +2,7 @@
  * CPU subsystem support
  */
 
+#include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/sched.h>
@@ -274,16 +275,12 @@ bool cpu_is_hotpluggable(unsigned cpu)
 }
 EXPORT_SYMBOL_GPL(cpu_is_hotpluggable);
 
-int __init cpu_dev_init(void)
+void __init cpu_dev_init(void)
 {
-        int err;
-
-        err = subsys_system_register(&cpu_subsys, cpu_root_attr_groups);
-        if (err)
-                return err;
+        if (subsys_system_register(&cpu_subsys, cpu_root_attr_groups))
+                panic("Failed to register CPU subsystem");
 
 #if defined(CONFIG_SCHED_MC) || defined(CONFIG_SCHED_SMT)
-        err = sched_create_sysfs_power_savings_entries(cpu_subsys.dev_root);
+        sched_create_sysfs_power_savings_entries(cpu_subsys.dev_root);
 #endif
-        return err;
 }