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Commit 024f7846 authored by Ben Hutchings's avatar Ben Hutchings Committed by Linus Torvalds
Browse files

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: default avatarBen Hutchings <ben@decadent.org.uk>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4f58cb90

drivers/base/base.h

+1 −1
Original line number Diff line number Diff line
@@ -94,7 +94,7 @@ extern int hypervisor_init(void); 
static inline int hypervisor_init(void) { return 0; }

#endif

extern int platform_bus_init(void);

extern int cpu_dev_init(void);

extern void cpu_dev_init(void);



extern int bus_add_device(struct device *dev);

extern void bus_probe_device(struct device *dev);

drivers/base/cpu.c

+5 −8
Original line number Diff line number Diff line
@@ -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;

}