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Commit 0344c6c5 authored by Christian Krafft's avatar Christian Krafft Committed by Paul Mackerras
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[POWERPC] sysfs: add support for adding/removing spu sysfs attributes 



This patch adds two functions to create and remove sysfs attributes and
attribute_group to all cpus.  That allows to register sysfs attributes in
a subdirectory like: /sys/devices/system/cpu/cpuX/group_name/what_ever
This will be used by cbe_thermal to group all attributes dealing with
thermal support in one directory.

Signed-of-by: default avatarChristian Krafft <krafft@de.ibm.com>

Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent e570beb6

arch/powerpc/kernel/sysfs.c

+66 −0
Original line number Diff line number Diff line
@@ -299,6 +299,72 @@ static struct notifier_block __cpuinitdata sysfs_cpu_nb = { 
	.notifier_call	= sysfs_cpu_notify,

};



static DEFINE_MUTEX(cpu_mutex);



int cpu_add_sysdev_attr(struct sysdev_attribute *attr)

{

	int cpu;



	mutex_lock(&cpu_mutex);



	for_each_possible_cpu(cpu) {

		sysdev_create_file(get_cpu_sysdev(cpu), attr);

	}



	mutex_unlock(&cpu_mutex);

	return 0;

}

EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);



int cpu_add_sysdev_attr_group(struct attribute_group *attrs)

{

	int cpu;

	struct sys_device *sysdev;



	mutex_lock(&cpu_mutex);



	for_each_possible_cpu(cpu) {

		sysdev = get_cpu_sysdev(cpu);

		sysfs_create_group(&sysdev->kobj, attrs);

	}



	mutex_unlock(&cpu_mutex);

	return 0;

}

EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);





void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)

{

	int cpu;



	mutex_lock(&cpu_mutex);



	for_each_possible_cpu(cpu) {

		sysdev_remove_file(get_cpu_sysdev(cpu), attr);

	}



	mutex_unlock(&cpu_mutex);

}

EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);



void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)

{

	int cpu;

	struct sys_device *sysdev;



	mutex_lock(&cpu_mutex);



	for_each_possible_cpu(cpu) {

		sysdev = get_cpu_sysdev(cpu);

		sysfs_remove_group(&sysdev->kobj, attrs);

	}



	mutex_unlock(&cpu_mutex);

}

EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);





/* NUMA stuff */



#ifdef CONFIG_NUMA

include/linux/cpu.h

+8 −0
Original line number Diff line number Diff line
@@ -33,6 +33,14 @@ struct cpu { 


extern int register_cpu(struct cpu *cpu, int num);

extern struct sys_device *get_cpu_sysdev(unsigned cpu);



extern int cpu_add_sysdev_attr(struct sysdev_attribute *attr);

extern void cpu_remove_sysdev_attr(struct sysdev_attribute *attr);



extern int cpu_add_sysdev_attr_group(struct attribute_group *attrs);

extern void cpu_remove_sysdev_attr_group(struct attribute_group *attrs);





#ifdef CONFIG_HOTPLUG_CPU

extern void unregister_cpu(struct cpu *cpu);

#endif