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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: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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2 changed files with 74 additions and 0 deletions
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@ -299,6 +299,72 @@ static struct notifier_block __cpuinitdata sysfs_cpu_nb = {
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.notifier_call = sysfs_cpu_notify,
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};
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static DEFINE_MUTEX(cpu_mutex);
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int cpu_add_sysdev_attr(struct sysdev_attribute *attr)
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{
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int cpu;
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mutex_lock(&cpu_mutex);
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for_each_possible_cpu(cpu) {
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sysdev_create_file(get_cpu_sysdev(cpu), attr);
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}
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mutex_unlock(&cpu_mutex);
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return 0;
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}
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EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr);
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int cpu_add_sysdev_attr_group(struct attribute_group *attrs)
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{
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int cpu;
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struct sys_device *sysdev;
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mutex_lock(&cpu_mutex);
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for_each_possible_cpu(cpu) {
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sysdev = get_cpu_sysdev(cpu);
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sysfs_create_group(&sysdev->kobj, attrs);
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}
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mutex_unlock(&cpu_mutex);
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return 0;
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}
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EXPORT_SYMBOL_GPL(cpu_add_sysdev_attr_group);
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void cpu_remove_sysdev_attr(struct sysdev_attribute *attr)
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{
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int cpu;
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mutex_lock(&cpu_mutex);
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for_each_possible_cpu(cpu) {
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sysdev_remove_file(get_cpu_sysdev(cpu), attr);
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}
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mutex_unlock(&cpu_mutex);
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}
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EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr);
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void cpu_remove_sysdev_attr_group(struct attribute_group *attrs)
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{
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int cpu;
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struct sys_device *sysdev;
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mutex_lock(&cpu_mutex);
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for_each_possible_cpu(cpu) {
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sysdev = get_cpu_sysdev(cpu);
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sysfs_remove_group(&sysdev->kobj, attrs);
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}
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mutex_unlock(&cpu_mutex);
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}
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EXPORT_SYMBOL_GPL(cpu_remove_sysdev_attr_group);
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/* NUMA stuff */
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#ifdef CONFIG_NUMA
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@ -33,6 +33,14 @@ struct cpu {
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extern int register_cpu(struct cpu *cpu, int num);
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extern struct sys_device *get_cpu_sysdev(unsigned cpu);
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extern int cpu_add_sysdev_attr(struct sysdev_attribute *attr);
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extern void cpu_remove_sysdev_attr(struct sysdev_attribute *attr);
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extern int cpu_add_sysdev_attr_group(struct attribute_group *attrs);
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extern void cpu_remove_sysdev_attr_group(struct attribute_group *attrs);
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#ifdef CONFIG_HOTPLUG_CPU
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extern void unregister_cpu(struct cpu *cpu);
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#endif
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