[PATCH 11/16] sysfs: add support for adding/removing spu sysfs attributes
From: arnd@arndb.de
Date: 2006-10-24 16:41:57
Also in:
lkml
From: Christian Krafft <redacted> 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 [off-list ref] Index: linux-2.6/arch/powerpc/kernel/sysfs.c ===================================================================
--- linux-2.6.orig/arch/powerpc/kernel/sysfs.c
+++ linux-2.6/arch/powerpc/kernel/sysfs.c@@ -299,6 +299,72 @@ static struct notifier_block __cpuinitda .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
Index: linux-2.6/include/linux/cpu.h ===================================================================
--- linux-2.6.orig/include/linux/cpu.h
+++ linux-2.6/include/linux/cpu.h@@ -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 --