diff options
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/Kconfig | 67 | ||||
| -rw-r--r-- | drivers/base/base.h | 27 | ||||
| -rw-r--r-- | drivers/base/class.c | 153 | ||||
| -rw-r--r-- | drivers/base/core.c | 196 | ||||
| -rw-r--r-- | drivers/base/cpu.c | 14 | ||||
| -rw-r--r-- | drivers/base/firmware_class.c | 35 | ||||
| -rw-r--r-- | drivers/base/memory.c | 12 | ||||
| -rw-r--r-- | drivers/base/node.c | 15 | ||||
| -rw-r--r-- | drivers/base/platform.c | 296 | ||||
| -rw-r--r-- | drivers/base/power/main.c | 675 | ||||
| -rw-r--r-- | drivers/base/power/power.h | 2 | ||||
| -rw-r--r-- | drivers/base/power/sysfs.c | 3 | ||||
| -rw-r--r-- | drivers/base/power/trace.c | 8 | ||||
| -rw-r--r-- | drivers/base/sys.c | 64 | ||||
| -rw-r--r-- | drivers/base/topology.c | 66 |
15 files changed, 1276 insertions, 357 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index d7da109c24fd..6318f6b57360 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -27,13 +27,78 @@ config PREVENT_FIRMWARE_BUILD If unsure say Y here. config FW_LOADER - tristate "Userspace firmware loading support" + tristate "Userspace firmware loading support" if EMBEDDED depends on HOTPLUG + default y ---help--- This option is provided for the case where no in-kernel-tree modules require userspace firmware loading support, but a module built outside the kernel tree does. +config FIRMWARE_IN_KERNEL + bool "Include in-kernel firmware blobs in kernel binary" + depends on FW_LOADER + default y + help + The kernel source tree includes a number of firmware 'blobs' + which are used by various drivers. The recommended way to + use these is to run "make firmware_install" and to copy the + resulting binary files created in usr/lib/firmware directory + of the kernel tree to the /lib/firmware on your system so + that they can be loaded by userspace helpers on request. + + Enabling this option will build each required firmware blob + into the kernel directly, where request_firmware() will find + them without having to call out to userspace. This may be + useful if your root file system requires a device which uses + such firmware, and do not wish to use an initrd. + + This single option controls the inclusion of firmware for + every driver which usees request_firmare() and ships its + firmware in the kernel source tree, to avoid a proliferation + of 'Include firmware for xxx device' options. + + Say 'N' and let firmware be loaded from userspace. + +config EXTRA_FIRMWARE + string "External firmware blobs to build into the kernel binary" + depends on FW_LOADER + help + This option allows firmware to be built into the kernel, for the + cases where the user either cannot or doesn't want to provide it from + userspace at runtime (for example, when the firmware in question is + required for accessing the boot device, and the user doesn't want to + use an initrd). + + This option is a string, and takes the (space-separated) names of the + firmware files -- the same names which appear in MODULE_FIRMWARE() + and request_firmware() in the source. These files should exist under + the directory specified by the EXTRA_FIRMWARE_DIR option, which is + by default the firmware/ subdirectory of the kernel source tree. + + So, for example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin", + copy the usb8388.bin file into the firmware/ directory, and build the + kernel. Then any request_firmware("usb8388.bin") will be + satisfied internally without needing to call out to userspace. + + WARNING: If you include additional firmware files into your binary + kernel image which are not available under the terms of the GPL, + then it may be a violation of the GPL to distribute the resulting + image -- since it combines both GPL and non-GPL work. You should + consult a lawyer of your own before distributing such an image. + +config EXTRA_FIRMWARE_DIR + string "Firmware blobs root directory" + depends on EXTRA_FIRMWARE != "" + default "firmware" + help + This option controls the directory in which the kernel build system + looks for the firmware files listed in the EXTRA_FIRMWARE option. + The default is the firmware/ directory in the kernel source tree, + but by changing this option you can point it elsewhere, such as + the /lib/firmware/ directory or another separate directory + containing firmware files. + config DEBUG_DRIVER bool "Driver Core verbose debug messages" depends on DEBUG_KERNEL diff --git a/drivers/base/base.h b/drivers/base/base.h index 2c9ae43e2219..31dc0cd84afa 100644 --- a/drivers/base/base.h +++ b/drivers/base/base.h @@ -36,6 +36,33 @@ struct driver_private { }; #define to_driver(obj) container_of(obj, struct driver_private, kobj) + +/** + * struct class_private - structure to hold the private to the driver core portions of the class structure. + * + * @class_subsys - the struct kset that defines this class. This is the main kobject + * @class_devices - list of devices associated with this class + * @class_interfaces - list of class_interfaces associated with this class + * @class_dirs - "glue" directory for virtual devices associated with this class + * @class_mutex - mutex to protect the children, devices, and interfaces lists. + * @class - pointer back to the struct class that this structure is associated + * with. + * + * This structure is the one that is the actual kobject allowing struct + * class to be statically allocated safely. Nothing outside of the driver + * core should ever touch these fields. + */ +struct class_private { + struct kset class_subsys; + struct list_head class_devices; + struct list_head class_interfaces; + struct kset class_dirs; + struct mutex class_mutex; + struct class *class; +}; +#define to_class(obj) \ + container_of(obj, struct class_private, class_subsys.kobj) + /* initialisation functions */ extern int devices_init(void); extern int buses_init(void); diff --git a/drivers/base/class.c b/drivers/base/class.c index e085af0ff94f..839d27cecb36 100644 --- a/drivers/base/class.c +++ b/drivers/base/class.c @@ -18,20 +18,20 @@ #include <linux/err.h> #include <linux/slab.h> #include <linux/genhd.h> +#include <linux/mutex.h> #include "base.h" #define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr) -#define to_class(obj) container_of(obj, struct class, subsys.kobj) static ssize_t class_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) { struct class_attribute *class_attr = to_class_attr(attr); - struct class *dc = to_class(kobj); + struct class_private *cp = to_class(kobj); ssize_t ret = -EIO; if (class_attr->show) - ret = class_attr->show(dc, buf); + ret = class_attr->show(cp->class, buf); return ret; } @@ -39,17 +39,18 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) { struct class_attribute *class_attr = to_class_attr(attr); - struct class *dc = to_class(kobj); + struct class_private *cp = to_class(kobj); ssize_t ret = -EIO; if (class_attr->store) - ret = class_attr->store(dc, buf, count); + ret = class_attr->store(cp->class, buf, count); return ret; } static void class_release(struct kobject *kobj) { - struct class *class = to_class(kobj); + struct class_private *cp = to_class(kobj); + struct class *class = cp->class; pr_debug("class '%s': release.\n", class->name); @@ -70,7 +71,7 @@ static struct kobj_type class_ktype = { .release = class_release, }; -/* Hotplug events for classes go to the class_obj subsys */ +/* Hotplug events for classes go to the class class_subsys */ static struct kset *class_kset; @@ -78,7 +79,8 @@ int class_create_file(struct class *cls, const struct class_attribute *attr) { int error; if (cls) - error = sysfs_create_file(&cls->subsys.kobj, &attr->attr); + error = sysfs_create_file(&cls->p->class_subsys.kobj, + &attr->attr); else error = -EINVAL; return error; @@ -87,21 +89,20 @@ int class_create_file(struct class *cls, const struct class_attribute *attr) void class_remove_file(struct class *cls, const struct class_attribute *attr) { if (cls) - sysfs_remove_file(&cls->subsys.kobj, &attr->attr); + sysfs_remove_file(&cls->p->class_subsys.kobj, &attr->attr); } static struct class *class_get(struct class *cls) { if (cls) - return container_of(kset_get(&cls->subsys), - struct class, subsys); - return NULL; + kset_get(&cls->p->class_subsys); + return cls; } static void class_put(struct class *cls) { if (cls) - kset_put(&cls->subsys); + kset_put(&cls->p->class_subsys); } static int add_class_attrs(struct class *cls) @@ -134,42 +135,57 @@ static void remove_class_attrs(struct class *cls) } } -int class_register(struct class *cls) +int __class_register(struct class *cls, struct lock_class_key *key) { + struct class_private *cp; int error; pr_debug("device class '%s': registering\n", cls->name); - INIT_LIST_HEAD(&cls->devices); - INIT_LIST_HEAD(&cls->interfaces); - kset_init(&cls->class_dirs); - init_MUTEX(&cls->sem); - error = kobject_set_name(&cls->subsys.kobj, "%s", cls->name); - if (error) + cp = kzalloc(sizeof(*cp), GFP_KERNEL); + if (!cp) + return -ENOMEM; + INIT_LIST_HEAD(&cp->class_devices); + INIT_LIST_HEAD(&cp->class_interfaces); + kset_init(&cp->class_dirs); + __mutex_init(&cp->class_mutex, "struct class mutex", key); + error = kobject_set_name(&cp->class_subsys.kobj, "%s", cls->name); + if (error) { + kfree(cp); return error; + } + + /* set the default /sys/dev directory for devices of this class */ + if (!cls->dev_kobj) + cls->dev_kobj = sysfs_dev_char_kobj; #if defined(CONFIG_SYSFS_DEPRECATED) && defined(CONFIG_BLOCK) /* let the block class directory show up in the root of sysfs */ if (cls != &block_class) - cls->subsys.kobj.kset = class_kset; + cp->class_subsys.kobj.kset = class_kset; #else - cls->subsys.kobj.kset = class_kset; + cp->class_subsys.kobj.kset = class_kset; #endif - cls->subsys.kobj.ktype = &class_ktype; + cp->class_subsys.kobj.ktype = &class_ktype; + cp->class = cls; + cls->p = cp; - error = kset_register(&cls->subsys); - if (!error) { - error = add_class_attrs(class_get(cls)); - class_put(cls); + error = kset_register(&cp->class_subsys); + if (error) { + kfree(cp); + return error; } + error = add_class_attrs(class_get(cls)); + class_put(cls); return error; } +EXPORT_SYMBOL_GPL(__class_register); void class_unregister(struct class *cls) { pr_debug("device class '%s': unregistering\n", cls->name); remove_class_attrs(cls); - kset_unregister(&cls->subsys); + kset_unregister(&cls->p->class_subsys); } static void class_create_release(struct class *cls) @@ -189,7 +205,8 @@ static void class_create_release(struct class *cls) * Note, the pointer created here is to be destroyed when finished by * making a call to class_destroy(). */ -struct class *class_create(struct module *owner, const char *name) +struct class *__class_create(struct module *owner, const char *name, + struct lock_class_key *key) { struct class *cls; int retval; @@ -204,7 +221,7 @@ struct class *class_create(struct module *owner, const char *name) cls->owner = owner; cls->class_release = class_create_release; - retval = class_register(cls); + retval = __class_register(cls, key); if (retval) goto error; @@ -214,6 +231,7 @@ error: kfree(cls); return ERR_PTR(retval); } +EXPORT_SYMBOL_GPL(__class_create); /** * class_destroy - destroys a struct class structure @@ -252,39 +270,44 @@ char *make_class_name(const char *name, struct kobject *kobj) /** * class_for_each_device - device iterator * @class: the class we're iterating + * @start: the device to start with in the list, if any. * @data: data for the callback * @fn: function to be called for each device * * Iterate over @class's list of devices, and call @fn for each, - * passing it @data. + * passing it @data. If @start is set, the list iteration will start + * there, otherwise if it is NULL, the iteration starts at the + * beginning of the list. * * We check the return of @fn each time. If it returns anything * other than 0, we break out and return that value. * - * Note, we hold class->sem in this function, so it can not be + * Note, we hold class->class_mutex in this function, so it can not be * re-acquired in @fn, otherwise it will self-deadlocking. For * example, calls to add or remove class members would be verboten. */ -int class_for_each_device(struct class *class, void *data, - int (*fn)(struct device *, void *)) +int class_for_each_device(struct class *class, struct device *start, + void *data, int (*fn)(struct device *, void *)) { struct device *dev; int error = 0; if (!class) return -EINVAL; - down(&class->sem); - list_for_each_entry(dev, &class->devices, node) { + mutex_lock(&class->p->class_mutex); + list_for_each_entry(dev, &class->p->class_devices, node) { + if (start) { + if (start == dev) + start = NULL; + continue; + } dev = get_device(dev); - if (dev) { - error = fn(dev, data); - put_device(dev); - } else - error = -ENODEV; + error = fn(dev, data); + put_device(dev); if (error) break; } - up(&class->sem); + mutex_unlock(&class->p->class_mutex); return error; } @@ -293,6 +316,7 @@ EXPORT_SYMBOL_GPL(class_for_each_device); /** * class_find_device - device iterator for locating a particular device * @class: the class we're iterating + * @start: Device to begin with * @data: data for the match function * @match: function to check device * @@ -306,12 +330,13 @@ EXPORT_SYMBOL_GPL(class_for_each_device); * * Note, you will need to drop the reference with put_device() after use. * - * We hold class->sem in this function, so it can not be + * We hold class->class_mutex in this function, so it can not be * re-acquired in @match, otherwise it will self-deadlocking. For * example, calls to add or remove class members would be verboten. */ -struct device *class_find_device(struct class *class, void *data, - int (*match)(struct device *, void *)) +struct device *class_find_device(struct class *class, struct device *start, + void *data, + int (*match)(struct device *, void *)) { struct device *dev; int found = 0; @@ -319,19 +344,21 @@ struct device *class_find_device(struct class *class, void *data, if (!class) return NULL; - down(&class->sem); - list_for_each_entry(dev, &class->devices, node) { + mutex_lock(&class->p->class_mutex); + list_for_each_entry(dev, &class->p->class_devices, node) { + if (start) { + if (start == dev) + start = NULL; + continue; + } dev = get_device(dev); - if (dev) { - if (match(dev, data)) { - found = 1; - break; - } else - put_device(dev); - } else + if (match(dev, data)) { + found = 1; break; + } else + put_device(dev); } - up(&class->sem); + mutex_unlock(&class->p->class_mutex); return found ? dev : NULL; } @@ -349,13 +376,13 @@ int class_interface_register(struct class_interface *class_intf) if (!parent) return -EINVAL; - down(&parent->sem); - list_add_tail(&class_intf->node, &parent->interfaces); + mutex_lock(&parent->p->class_mutex); + list_add_tail(&class_intf->node, &parent->p->class_interfaces); if (class_intf->add_dev) { - list_for_each_entry(dev, &parent->devices, node) + list_for_each_entry(dev, &parent->p->class_devices, node) class_intf->add_dev(dev, class_intf); } - up(&parent->sem); + mutex_unlock(&parent->p->class_mutex); return 0; } @@ -368,13 +395,13 @@ void class_interface_unregister(struct class_interface *class_intf) if (!parent) return; - down(&parent->sem); + mutex_lock(&parent->p->class_mutex); list_del_init(&class_intf->node); if (class_intf->remove_dev) { - list_for_each_entry(dev, &parent->devices, node) + list_for_each_entry(dev, &parent->p->class_devices, node) class_intf->remove_dev(dev, class_intf); } - up(&parent->sem); + mutex_unlock(&parent->p->class_mutex); class_put(parent); } @@ -389,9 +416,7 @@ int __init classes_init(void) EXPORT_SYMBOL_GPL(class_create_file); EXPORT_SYMBOL_GPL(class_remove_file); -EXPORT_SYMBOL_GPL(class_register); EXPORT_SYMBOL_GPL(class_unregister); -EXPORT_SYMBOL_GPL(class_create); EXPORT_SYMBOL_GPL(class_destroy); EXPORT_SYMBOL_GPL(class_interface_register); diff --git a/drivers/base/core.c b/drivers/base/core.c index ee0a51a3a41d..7d5c63c81a59 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -21,12 +21,16 @@ #include <linux/genhd.h> #include <linux/kallsyms.h> #include <linux/semaphore.h> +#include <linux/mutex.h> #include "base.h" #include "power/power.h" int (*platform_notify)(struct device *dev) = NULL; int (*platform_notify_remove)(struct device *dev) = NULL; +static struct kobject *dev_kobj; +struct kobject *sysfs_dev_char_kobj; +struct kobject *sysfs_dev_block_kobj; #ifdef CONFIG_BLOCK static inline int device_is_not_partition(struct device *dev) @@ -548,7 +552,7 @@ static struct kobject *get_device_parent(struct device *dev, { /* class devices without a parent live in /sys/class/<classname>/ */ if (dev->class && (!parent || parent->class != dev->class)) - return &dev->class->subsys.kobj; + return &dev->class->p->class_subsys.kobj; /* all other devices keep their parent */ else if (parent) return &parent->kobj; @@ -594,13 +598,13 @@ static struct kobject *get_device_parent(struct device *dev, parent_kobj = &parent->kobj; /* find our class-directory at the parent and reference it */ - spin_lock(&dev->class->class_dirs.list_lock); - list_for_each_entry(k, &dev->class->class_dirs.list, entry) + spin_lock(&dev->class->p->class_dirs.list_lock); + list_for_each_entry(k, &dev->class->p->class_dirs.list, entry) if (k->parent == parent_kobj) { kobj = kobject_get(k); break; } - spin_unlock(&dev->class->class_dirs.list_lock); + spin_unlock(&dev->class->p->class_dirs.list_lock); if (kobj) return kobj; @@ -608,7 +612,7 @@ static struct kobject *get_device_parent(struct device *dev, k = kobject_create(); if (!k) return NULL; - k->kset = &dev->class->class_dirs; + k->kset = &dev->class->p->class_dirs; retval = kobject_add(k, parent_kobj, "%s", dev->class->name); if (retval < 0) { kobject_put(k); @@ -627,7 +631,7 @@ static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir) { /* see if we live in a "glue" directory */ if (!glue_dir || !dev->class || - glue_dir->kset != &dev->class->class_dirs) + glue_dir->kset != &dev->class->p->class_dirs) return; kobject_put(glue_dir); @@ -654,17 +658,18 @@ static int device_add_class_symlinks(struct device *dev) if (!dev->class) return 0; - error = sysfs_create_link(&dev->kobj, &dev->class->subsys.kobj, + error = sysfs_create_link(&dev->kobj, + &dev->class->p->class_subsys.kobj, "subsystem"); if (error) goto out; #ifdef CONFIG_SYSFS_DEPRECATED /* stacked class devices need a symlink in the class directory */ - if (dev->kobj.parent != &dev->class->subsys.kobj && + if (dev->kobj.parent != &dev->class->p->class_subsys.kobj && device_is_not_partition(dev)) { - error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj, - dev->bus_id); + error = sysfs_create_link(&dev->class->p->class_subsys.kobj, + &dev->kobj, dev->bus_id); if (error) goto out_subsys; } @@ -701,13 +706,14 @@ out_device: if (dev->parent && device_is_not_partition(dev)) sysfs_remove_link(&dev->kobj, "device"); out_busid: - if (dev->kobj.parent != &dev->class->subsys.kobj && + if (dev->kobj.parent != &dev->class->p->class_subsys.kobj && device_is_not_partition(dev)) - sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id); + sysfs_remove_link(&dev->class->p->class_subsys.kobj, + dev->bus_id); #else /* link in the class directory pointing to the device */ - error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj, - dev->bus_id); + error = sysfs_create_link(&dev->class->p->class_subsys.kobj, + &dev->kobj, dev->bus_id); if (error) goto out_subsys; @@ -720,7 +726,7 @@ out_busid: return 0; out_busid: - sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id); + sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev->bus_id); #endif out_subsys: @@ -746,14 +752,15 @@ static void device_remove_class_symlinks(struct device *dev) sysfs_remove_link(&dev->kobj, "device"); } - if (dev->kobj.parent != &dev->class->subsys.kobj && + if (dev->kobj.parent != &dev->class->p->class_subsys.kobj && device_is_not_partition(dev)) - sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id); + sysfs_remove_link(&dev->class->p->class_subsys.kobj, + dev->bus_id); #else if (dev->parent && device_is_not_partition(dev)) sysfs_remove_link(&dev->kobj, "device"); - sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id); + sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev->bus_id); #endif sysfs_remove_link(&dev->kobj, "subsystem"); @@ -776,6 +783,54 @@ int dev_set_name(struct device *dev, const char *fmt, ...) EXPORT_SYMBOL_GPL(dev_set_name); /** + * device_to_dev_kobj - select a /sys/dev/ directory for the device + * @dev: device + * + * By default we select char/ for new entries. Setting class->dev_obj + * to NULL prevents an entry from being created. class->dev_kobj must + * be set (or cleared) before any devices are registered to the class + * otherwise device_create_sys_dev_entry() and + * device_remove_sys_dev_entry() will disagree about the the presence + * of the link. + */ +static struct kobject *device_to_dev_kobj(struct device *dev) +{ + struct kobject *kobj; + + if (dev->class) + kobj = dev->class->dev_kobj; + else + kobj = sysfs_dev_char_kobj; + + return kobj; +} + +static int device_create_sys_dev_entry(struct device *dev) +{ + struct kobject *kobj = device_to_dev_kobj(dev); + int error = 0; + char devt_str[15]; + + if (kobj) { + format_dev_t(devt_str, dev->devt); + error = sysfs_create_link(kobj, &dev->kobj, devt_str); + } + + return error; +} + +static void device_remove_sys_dev_entry(struct device *dev) +{ + struct kobject *kobj = device_to_dev_kobj(dev); + char devt_str[15]; + + if (kobj) { + format_dev_t(devt_str, dev->devt); + sysfs_remove_link(kobj, devt_str); + } +} + +/** * device_add - add device to device hierarchy. * @dev: device. * @@ -829,6 +884,10 @@ int device_add(struct device *dev) error = device_create_file(dev, &devt_attr); if (error) goto ueventattrError; + + error = device_create_sys_dev_entry(dev); + if (error) + goto devtattrError; } error = device_add_class_symlinks(dev); @@ -849,15 +908,16 @@ int device_add(struct device *dev) klist_add_tail(&dev->knode_parent, &parent->klist_children); if (dev->class) { - down(&dev->class->sem); + mutex_lock(&dev->class->p->class_mutex); /* tie the class to the device */ - list_add_tail(&dev->node, &dev->class->devices); + list_add_tail(&dev->node, &dev->class->p->class_devices); /* notify any interfaces that the device is here */ - list_for_each_entry(class_intf, &dev->class->interfaces, node) + list_for_each_entry(class_intf, + &dev->class->p->class_interfaces, node) if (class_intf->add_dev) class_intf->add_dev(dev, class_intf); - up(&dev->class->sem); + mutex_unlock(&dev->class->p->class_mutex); } Done: put_device(dev); @@ -873,6 +933,9 @@ int device_add(struct device *dev) device_remove_class_symlinks(dev); SymlinkError: if (MAJOR(dev->devt)) + device_remove_sys_dev_entry(dev); + devtattrError: + if (MAJOR(dev->devt)) device_remove_file(dev, &devt_attr); ueventattrError: device_remove_file(dev, &uevent_attr); @@ -948,19 +1011,22 @@ void device_del(struct device *dev) device_pm_remove(dev); if (parent) klist_del(&dev->knode_parent); - if (MAJOR(dev->devt)) + if (MAJOR(dev->devt)) { + device_remove_sys_dev_entry(dev); device_remove_file(dev, &devt_attr); + } if (dev->class) { device_remove_class_symlinks(dev); - down(&dev->class->sem); + mutex_lock(&dev->class->p->class_mutex); /* notify any interfaces that the device is now gone */ - list_for_each_entry(class_intf, &dev->class->interfaces, node) + list_for_each_entry(class_intf, + &dev->class->p->class_interfaces, node) if (class_intf->remove_dev) class_intf->remove_dev(dev, class_intf); /* remove the device from the class list */ list_del_init(&dev->node); - up(&dev->class->sem); + mutex_unlock(&dev->class->p->class_mutex); } device_remove_file(dev, &uevent_attr); device_remove_attrs(dev); @@ -1074,7 +1140,25 @@ int __init devices_init(void) devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL); if (!devices_kset) return -ENOMEM; + dev_kobj = kobject_create_and_add("dev", NULL); + if (!dev_kobj) + goto dev_kobj_err; + sysfs_dev_block_kobj = kobject_create_and_add("block", dev_kobj); + if (!sysfs_dev_block_kobj) + goto block_kobj_err; + sysfs_dev_char_kobj = kobject_create_and_add("char", dev_kobj); + if (!sysfs_dev_char_kobj) + goto char_kobj_err; + return 0; + + char_kobj_err: + kobject_put(sysfs_dev_block_kobj); + block_kobj_err: + kobject_put(dev_kobj); + dev_kobj_err: + kset_unregister(devices_kset); + return -ENOMEM; } EXPORT_SYMBOL_GPL(device_for_each_child); @@ -1158,48 +1242,11 @@ error: EXPORT_SYMBOL_GPL(device_create_vargs); /** - * device_create_drvdata - creates a device and registers it with sysfs - * @class: pointer to the struct class that this device should be registered to - * @parent: pointer to the parent struct device of this new device, if any - * @devt: the dev_t for the char device to be added - * @drvdata: the data to be added to the device for callbacks - * @fmt: string for the device's name - * - * This function can be used by char device classes. A struct device - * will be created in sysfs, registered to the specified class. - * - * A "dev" file will be created, showing the dev_t for the device, if - * the dev_t is not 0,0. - * If a pointer to a parent struct device is passed in, the newly created - * struct device will be a child of that device in sysfs. - * The pointer to the struct device will be returned from the call. - * Any further sysfs files that might be required can be created using this - * pointer. - * - * Note: the struct class passed to this function must have previously - * been created with a call to class_create(). - */ -struct device *device_create_drvdata(struct class *class, - struct device *parent, - dev_t devt, - void *drvdata, - const char *fmt, ...) -{ - va_list vargs; - struct device *dev; - - va_start(vargs, fmt); - dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs); - va_end(vargs); - return dev; -} -EXPORT_SYMBOL_GPL(device_create_drvdata); - -/** * device_create - creates a device and registers it with sysfs * @class: pointer to the struct class that this device should be registered to * @parent: pointer to the parent struct device of this new device, if any * @devt: the dev_t for the char device to be added + * @drvdata: the data to be added to the device for callbacks * @fmt: string for the device's name * * This function can be used by char device classes. A struct device @@ -1217,13 +1264,13 @@ EXPORT_SYMBOL_GPL(device_create_drvdata); * been created with a call to class_create(). */ struct device *device_create(struct class *class, struct device *parent, - dev_t devt, const char *fmt, ...) + dev_t devt, void *drvdata, const char *fmt, ...) { va_list vargs; struct device *dev; va_start(vargs, fmt); - dev = device_create_vargs(class, parent, devt, NULL, fmt, vargs); + dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs); va_end(vargs); return dev; } @@ -1248,7 +1295,7 @@ void device_destroy(struct class *class, dev_t devt) { struct device *dev; - dev = class_find_device(class, &devt, __match_devt); + dev = class_find_device(class, NULL, &devt, __match_devt); if (dev) { put_device(dev); device_unregister(dev); @@ -1298,8 +1345,9 @@ int device_rename(struct device *dev, char *new_name) if (old_class_name) { new_class_name = make_class_name(dev->class->name, &dev->kobj); if (new_class_name) { - error = sysfs_create_link(&dev->parent->kobj, - &dev->kobj, new_class_name); + error = sysfs_create_link_nowarn(&dev->parent->kobj, + &dev->kobj, + new_class_name); if (error) goto out; sysfs_remove_link(&dev->parent->kobj, old_class_name); @@ -1307,11 +1355,12 @@ int device_rename(struct device *dev, char *new_name) } #else if (dev->class) { - error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj, - dev->bus_id); + error = sysfs_create_link_nowarn(&dev->class->p->class_subsys.kobj, + &dev->kobj, dev->bus_id); if (error) goto out; - sysfs_remove_link(&dev->class->subsys.kobj, old_device_name); + sysfs_remove_link(&dev->class->p->class_subsys.kobj, + old_device_name); } #endif @@ -1447,4 +1496,7 @@ void device_shutdown(void) dev->driver->shutdown(dev); } } + kobject_put(sysfs_dev_char_kobj); + kobject_put(sysfs_dev_block_kobj); + kobject_put(dev_kobj); } diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index e38dfed41d80..64f5d54f7edc 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -21,15 +21,16 @@ EXPORT_SYMBOL(cpu_sysdev_class); static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices); #ifdef CONFIG_HOTPLUG_CPU -static ssize_t show_online(struct sys_device *dev, char *buf) +static ssize_t show_online(struct sys_device *dev, struct sysdev_attribute *attr, + char *buf) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); return sprintf(buf, "%u\n", !!cpu_online(cpu->sysdev.id)); } -static ssize_t __ref store_online(struct sys_device *dev, const char *buf, - size_t count) +static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribute *attr, + const char *buf, size_t count) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); ssize_t ret; @@ -80,7 +81,8 @@ static inline void register_cpu_control(struct cpu *cpu) #ifdef CONFIG_KEXEC #include <linux/kexec.h> -static ssize_t show_crash_notes(struct sys_device *dev, char *buf) +static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute *attr, + char *buf) { struct cpu *cpu = container_of(dev, struct cpu, sysdev); ssize_t rc; @@ -119,14 +121,14 @@ static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf) \ { \ return print_cpus_map(buf, &cpu_##type##_map); \ } \ -struct sysdev_class_attribute attr_##type##_map = \ +static struct sysdev_class_attribute attr_##type##_map = \ _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL) print_cpus_func(online); print_cpus_func(possible); print_cpus_func(present); -struct sysdev_class_attribute *cpu_state_attr[] = { +static struct sysdev_class_attribute *cpu_state_attr[] = { &attr_online_map, &attr_possible_map, &attr_present_map, diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c index 9fd4a8534146..b0be1d18fee2 100644 --- a/drivers/base/firmware_class.c +++ b/ |