From 8a25a2fd126c621f44f3aeaef80d51f00fc11639 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Wed, 21 Dec 2011 14:29:42 -0800 Subject: cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem This moves the 'cpu sysdev_class' over to a regular 'cpu' subsystem and converts the devices to regular devices. The sysdev drivers are implemented as subsystem interfaces now. After all sysdev classes are ported to regular driver core entities, the sysdev implementation will be entirely removed from the kernel. Userspace relies on events and generic sysfs subsystem infrastructure from sysdev devices, which are made available with this conversion. Cc: Haavard Skinnemoen Cc: Hans-Christian Egtvedt Cc: Tony Luck Cc: Fenghua Yu Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Paul Mundt Cc: "David S. Miller" Cc: Chris Metcalf Cc: Thomas Gleixner Cc: Ingo Molnar Cc: "H. Peter Anvin" Cc: Borislav Petkov Cc: Tigran Aivazian Cc: Len Brown Cc: Zhang Rui Cc: Dave Jones Cc: Peter Zijlstra Cc: Russell King Cc: Andrew Morton Cc: Arjan van de Ven Cc: "Rafael J. Wysocki" Cc: "Srivatsa S. Bhat" Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman --- drivers/cpuidle/cpuidle.c | 12 ++++---- drivers/cpuidle/cpuidle.h | 10 +++---- drivers/cpuidle/sysfs.c | 74 +++++++++++++++++++++++------------------------ 3 files changed, 47 insertions(+), 49 deletions(-) (limited to 'drivers/cpuidle') diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c index 06ce2680d00d..59f4261c753a 100644 --- a/drivers/cpuidle/cpuidle.c +++ b/drivers/cpuidle/cpuidle.c @@ -291,10 +291,10 @@ EXPORT_SYMBOL_GPL(cpuidle_disable_device); static int __cpuidle_register_device(struct cpuidle_device *dev) { int ret; - struct sys_device *sys_dev = get_cpu_sysdev((unsigned long)dev->cpu); + struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu); struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver(); - if (!sys_dev) + if (!dev) return -EINVAL; if (!try_module_get(cpuidle_driver->owner)) return -EINVAL; @@ -303,7 +303,7 @@ static int __cpuidle_register_device(struct cpuidle_device *dev) per_cpu(cpuidle_devices, dev->cpu) = dev; list_add(&dev->device_list, &cpuidle_detected_devices); - if ((ret = cpuidle_add_sysfs(sys_dev))) { + if ((ret = cpuidle_add_sysfs(cpu_dev))) { module_put(cpuidle_driver->owner); return ret; } @@ -344,7 +344,7 @@ EXPORT_SYMBOL_GPL(cpuidle_register_device); */ void cpuidle_unregister_device(struct cpuidle_device *dev) { - struct sys_device *sys_dev = get_cpu_sysdev((unsigned long)dev->cpu); + struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu); struct cpuidle_driver *cpuidle_driver = cpuidle_get_driver(); if (dev->registered == 0) @@ -354,7 +354,7 @@ void cpuidle_unregister_device(struct cpuidle_device *dev) cpuidle_disable_device(dev); - cpuidle_remove_sysfs(sys_dev); + cpuidle_remove_sysfs(cpu_dev); list_del(&dev->device_list); wait_for_completion(&dev->kobj_unregister); per_cpu(cpuidle_devices, dev->cpu) = NULL; @@ -411,7 +411,7 @@ static int __init cpuidle_init(void) if (cpuidle_disabled()) return -ENODEV; - ret = cpuidle_add_class_sysfs(&cpu_sysdev_class); + ret = cpuidle_add_interface(cpu_subsys.dev_root); if (ret) return ret; diff --git a/drivers/cpuidle/cpuidle.h b/drivers/cpuidle/cpuidle.h index 38c3fd8b9d76..7db186685c27 100644 --- a/drivers/cpuidle/cpuidle.h +++ b/drivers/cpuidle/cpuidle.h @@ -5,7 +5,7 @@ #ifndef __DRIVER_CPUIDLE_H #define __DRIVER_CPUIDLE_H -#include +#include /* For internal use only */ extern struct cpuidle_governor *cpuidle_curr_governor; @@ -23,11 +23,11 @@ extern void cpuidle_uninstall_idle_handler(void); extern int cpuidle_switch_governor(struct cpuidle_governor *gov); /* sysfs */ -extern int cpuidle_add_class_sysfs(struct sysdev_class *cls); -extern void cpuidle_remove_class_sysfs(struct sysdev_class *cls); +extern int cpuidle_add_interface(struct device *dev); +extern void cpuidle_remove_interface(struct device *dev); extern int cpuidle_add_state_sysfs(struct cpuidle_device *device); extern void cpuidle_remove_state_sysfs(struct cpuidle_device *device); -extern int cpuidle_add_sysfs(struct sys_device *sysdev); -extern void cpuidle_remove_sysfs(struct sys_device *sysdev); +extern int cpuidle_add_sysfs(struct device *dev); +extern void cpuidle_remove_sysfs(struct device *dev); #endif /* __DRIVER_CPUIDLE_H */ diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c index 1e756e160dca..3fe41fe4851a 100644 --- a/drivers/cpuidle/sysfs.c +++ b/drivers/cpuidle/sysfs.c @@ -22,8 +22,8 @@ static int __init cpuidle_sysfs_setup(char *unused) } __setup("cpuidle_sysfs_switch", cpuidle_sysfs_setup); -static ssize_t show_available_governors(struct sysdev_class *class, - struct sysdev_class_attribute *attr, +static ssize_t show_available_governors(struct device *dev, + struct device_attribute *attr, char *buf) { ssize_t i = 0; @@ -42,8 +42,8 @@ out: return i; } -static ssize_t show_current_driver(struct sysdev_class *class, - struct sysdev_class_attribute *attr, +static ssize_t show_current_driver(struct device *dev, + struct device_attribute *attr, char *buf) { ssize_t ret; @@ -59,8 +59,8 @@ static ssize_t show_current_driver(struct sysdev_class *class, return ret; } -static ssize_t show_current_governor(struct sysdev_class *class, - struct sysdev_class_attribute *attr, +static ssize_t show_current_governor(struct device *dev, + struct device_attribute *attr, char *buf) { ssize_t ret; @@ -75,8 +75,8 @@ static ssize_t show_current_governor(struct sysdev_class *class, return ret; } -static ssize_t store_current_governor(struct sysdev_class *class, - struct sysdev_class_attribute *attr, +static ssize_t store_current_governor(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) { char gov_name[CPUIDLE_NAME_LEN]; @@ -109,50 +109,48 @@ static ssize_t store_current_governor(struct sysdev_class *class, return count; } -static SYSDEV_CLASS_ATTR(current_driver, 0444, show_current_driver, NULL); -static SYSDEV_CLASS_ATTR(current_governor_ro, 0444, show_current_governor, - NULL); +static DEVICE_ATTR(current_driver, 0444, show_current_driver, NULL); +static DEVICE_ATTR(current_governor_ro, 0444, show_current_governor, NULL); -static struct attribute *cpuclass_default_attrs[] = { - &attr_current_driver.attr, - &attr_current_governor_ro.attr, +static struct attribute *cpuidle_default_attrs[] = { + &dev_attr_current_driver.attr, + &dev_attr_current_governor_ro.attr, NULL }; -static SYSDEV_CLASS_ATTR(available_governors, 0444, show_available_governors, - NULL); -static SYSDEV_CLASS_ATTR(current_governor, 0644, show_current_governor, - store_current_governor); +static DEVICE_ATTR(available_governors, 0444, show_available_governors, NULL); +static DEVICE_ATTR(current_governor, 0644, show_current_governor, + store_current_governor); -static struct attribute *cpuclass_switch_attrs[] = { - &attr_available_governors.attr, - &attr_current_driver.attr, - &attr_current_governor.attr, +static struct attribute *cpuidle_switch_attrs[] = { + &dev_attr_available_governors.attr, + &dev_attr_current_driver.attr, + &dev_attr_current_governor.attr, NULL }; -static struct attribute_group cpuclass_attr_group = { - .attrs = cpuclass_default_attrs, +static struct attribute_group cpuidle_attr_group = { + .attrs = cpuidle_default_attrs, .name = "cpuidle", }; /** - * cpuidle_add_class_sysfs - add CPU global sysfs attributes + * cpuidle_add_interface - add CPU global sysfs attributes */ -int cpuidle_add_class_sysfs(struct sysdev_class *cls) +int cpuidle_add_interface(struct device *dev) { if (sysfs_switch) - cpuclass_attr_group.attrs = cpuclass_switch_attrs; + cpuidle_attr_group.attrs = cpuidle_switch_attrs; - return sysfs_create_group(&cls->kset.kobj, &cpuclass_attr_group); + return sysfs_create_group(&dev->kobj, &cpuidle_attr_group); } /** - * cpuidle_remove_class_sysfs - remove CPU global sysfs attributes + * cpuidle_remove_interface - remove CPU global sysfs attributes */ -void cpuidle_remove_class_sysfs(struct sysdev_class *cls) +void cpuidle_remove_interface(struct device *dev) { - sysfs_remove_group(&cls->kset.kobj, &cpuclass_attr_group); + sysfs_remove_group(&dev->kobj, &cpuidle_attr_group); } struct cpuidle_attr { @@ -365,16 +363,16 @@ void cpuidle_remove_state_sysfs(struct cpuidle_device *device) /** * cpuidle_add_sysfs - creates a sysfs instance for the target device - * @sysdev: the target device + * @dev: the target device */ -int cpuidle_add_sysfs(struct sys_device *sysdev) +int cpuidle_add_sysfs(struct device *cpu_dev) { - int cpu = sysdev->id; + int cpu = cpu_dev->id; struct cpuidle_device *dev; int error; dev = per_cpu(cpuidle_devices, cpu); - error = kobject_init_and_add(&dev->kobj, &ktype_cpuidle, &sysdev->kobj, + error = kobject_init_and_add(&dev->kobj, &ktype_cpuidle, &cpu_dev->kobj, "cpuidle"); if (!error) kobject_uevent(&dev->kobj, KOBJ_ADD); @@ -383,11 +381,11 @@ int cpuidle_add_sysfs(struct sys_device *sysdev) /** * cpuidle_remove_sysfs - deletes a sysfs instance on the target device - * @sysdev: the target device + * @dev: the target device */ -void cpuidle_remove_sysfs(struct sys_device *sysdev) +void cpuidle_remove_sysfs(struct device *cpu_dev) { - int cpu = sysdev->id; + int cpu = cpu_dev->id; struct cpuidle_device *dev; dev = per_cpu(cpuidle_devices, cpu); -- cgit v1.2.1