From e3a15db2415579d5136b9ba9b52fe27c66da8780 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 26 Apr 2005 02:31:08 -0500 Subject: [PATCH] sysfs_{create|remove}_link should take const char * sysfs: make sysfs_{create|remove}_link to take const char * name. Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- include/linux/sysfs.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'include') diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 38b58b30814..931b5aaaf38 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -105,11 +105,11 @@ sysfs_chmod_file(struct kobject *kobj, struct attribute *attr, mode_t mode); extern void sysfs_remove_file(struct kobject *, const struct attribute *); -extern int -sysfs_create_link(struct kobject * kobj, struct kobject * target, char * name); +extern int +sysfs_create_link(struct kobject * kobj, struct kobject * target, const char * name); extern void -sysfs_remove_link(struct kobject *, char * name); +sysfs_remove_link(struct kobject *, const char * name); int sysfs_create_bin_file(struct kobject * kobj, struct bin_attribute * attr); int sysfs_remove_bin_file(struct kobject * kobj, struct bin_attribute * attr); @@ -153,12 +153,12 @@ static inline void sysfs_remove_file(struct kobject * k, const struct attribute ; } -static inline int sysfs_create_link(struct kobject * k, struct kobject * t, char * n) +static inline int sysfs_create_link(struct kobject * k, struct kobject * t, const char * n) { return 0; } -static inline void sysfs_remove_link(struct kobject * k, char * name) +static inline void sysfs_remove_link(struct kobject * k, const char * name) { ; } -- cgit v1.2.3 From f3b4f3c6dec04c6c8261fe22645f07b39976595a Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 26 Apr 2005 02:32:00 -0500 Subject: [PATCH] Make kobject's name be const char * kobject: make kobject's name const char * since users should not attempt to change it (except by calling kobject_rename). Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- include/linux/kobject.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/kobject.h b/include/linux/kobject.h index 765d660d3be..76dc67245c0 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -33,7 +33,7 @@ extern u64 hotplug_seqnum; struct kobject { - char * k_name; + const char * k_name; char name[KOBJ_NAME_LEN]; struct kref kref; struct list_head entry; @@ -46,7 +46,7 @@ struct kobject { extern int kobject_set_name(struct kobject *, const char *, ...) __attribute__((format(printf,2,3))); -static inline char * kobject_name(struct kobject * kobj) +static inline const char * kobject_name(const struct kobject * kobj) { return kobj->k_name; } @@ -57,7 +57,7 @@ extern void kobject_cleanup(struct kobject *); extern int kobject_add(struct kobject *); extern void kobject_del(struct kobject *); -extern int kobject_rename(struct kobject *, char *new_name); +extern int kobject_rename(struct kobject *, const char *new_name); extern int kobject_register(struct kobject *); extern void kobject_unregister(struct kobject *); -- cgit v1.2.3 From 419cab3fc69588ebe35b845cc3a584ae172463de Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 26 Apr 2005 02:32:54 -0500 Subject: [PATCH] kset_hotplug_ops->name shoudl return const char * kobject: change name() method in kset_hotplug_ops return const char * since users shoudl not try to modify returned data. Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- include/linux/kobject.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/kobject.h b/include/linux/kobject.h index 76dc67245c0..3b22304f12f 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -94,7 +94,7 @@ struct kobj_type { */ struct kset_hotplug_ops { int (*filter)(struct kset *kset, struct kobject *kobj); - char *(*name)(struct kset *kset, struct kobject *kobj); + const char *(*name)(struct kset *kset, struct kobject *kobj); int (*hotplug)(struct kset *kset, struct kobject *kobj, char **envp, int num_envp, char *buffer, int buffer_size); }; -- cgit v1.2.3 From 8d790d74085833ba2a3e84b5bcd683be4981c29a Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Tue, 26 Apr 2005 02:34:05 -0500 Subject: [PATCH] make driver's name be const char * Driver core: change driver's, bus's, class's and platform device's names to be const char * so one can use const char *drv_name = "asdfg"; when initializing structures. Also kill couple of whitespaces. Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index df94c0de53f..fa9e6ca08f5 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -47,7 +47,7 @@ struct class_device; struct class_simple; struct bus_type { - char * name; + const char * name; struct subsystem subsys; struct kset drivers; @@ -98,17 +98,17 @@ extern int bus_create_file(struct bus_type *, struct bus_attribute *); extern void bus_remove_file(struct bus_type *, struct bus_attribute *); struct device_driver { - char * name; + const char * name; struct bus_type * bus; struct completion unloaded; struct kobject kobj; struct list_head devices; - struct module * owner; + struct module * owner; int (*probe) (struct device * dev); - int (*remove) (struct device * dev); + int (*remove) (struct device * dev); void (*shutdown) (struct device * dev); int (*suspend) (struct device * dev, pm_message_t state, u32 level); int (*resume) (struct device * dev, u32 level); @@ -142,7 +142,7 @@ extern void driver_remove_file(struct device_driver *, struct driver_attribute * * device classes */ struct class { - char * name; + const char * name; struct subsystem subsys; struct list_head children; @@ -366,7 +366,7 @@ extern struct device *device_find(const char *name, struct bus_type *bus); /* drivers/base/platform.c */ struct platform_device { - char * name; + const char * name; u32 id; struct device dev; u32 num_resources; -- cgit v1.2.3 From d48593bf208e0d046c35fb0707ae5b23fef8c4ff Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Fri, 29 Apr 2005 00:58:46 -0500 Subject: [PATCH] Make attributes names const char * sysfs: make attributes and attribute_group's names const char * Signed-off-by: Dmitry Torokhov Signed-off-by: Greg Kroah-Hartman --- include/linux/sysfs.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index 931b5aaaf38..d9cd2d31d37 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -16,13 +16,13 @@ struct kobject; struct module; struct attribute { - char * name; + const char * name; struct module * owner; mode_t mode; }; struct attribute_group { - char * name; + const char * name; struct attribute ** attrs; }; -- cgit v1.2.3 From e9ba6365fd4f0d9e7d022c883bd044fbaa48257f Mon Sep 17 00:00:00 2001 From: "gregkh@suse.de" Date: Tue, 15 Mar 2005 11:54:21 -0800 Subject: [PATCH] CLASS: move a "simple" class logic into the class core. One step on improving the class api so that it can not be used incorrectly. This also fixes the module owner issue with the dev files that happened when the devt logic moved to the class core. Based on a patch originally written by Kay Sievers Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index fa9e6ca08f5..73250d01c01 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -143,6 +143,7 @@ extern void driver_remove_file(struct device_driver *, struct driver_attribute * */ struct class { const char * name; + struct module * owner; struct subsystem subsys; struct list_head children; @@ -185,6 +186,7 @@ struct class_device { struct kobject kobj; struct class * class; /* required */ dev_t devt; /* dev_t, creates the sysfs "dev" */ + struct class_device_attribute *devt_attr; struct device * dev; /* not necessary, but nice to have */ void * class_data; /* class-specific data */ @@ -245,6 +247,13 @@ struct class_interface { extern int class_interface_register(struct class_interface *); extern void class_interface_unregister(struct class_interface *); +extern struct class *class_create(struct module *owner, char *name); +extern void class_destroy(struct class *cls); +extern struct class_device *class_device_create(struct class *cls, dev_t devt, + struct device *device, char *fmt, ...) + __attribute__((format(printf,4,5))); +extern void class_device_destroy(struct class *cls, dev_t devt); + /* interface for class simple stuff */ extern struct class_simple *class_simple_create(struct module *owner, char *name); extern void class_simple_destroy(struct class_simple *cs); -- cgit v1.2.3 From 1235686f6e67cf30c460eb77d90a6cb4be57b92f Mon Sep 17 00:00:00 2001 From: "gregkh@suse.de" Date: Tue, 15 Mar 2005 14:26:30 -0800 Subject: [PATCH] INPUT: move to use the new class code, instead of class_simple Signed-off-by: Greg Kroah-Hartman --- include/linux/input.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/input.h b/include/linux/input.h index 72731d7d189..9d9598ed760 100644 --- a/include/linux/input.h +++ b/include/linux/input.h @@ -1015,7 +1015,7 @@ static inline void input_set_abs_params(struct input_dev *dev, int axis, int min dev->absbit[LONG(axis)] |= BIT(axis); } -extern struct class_simple *input_class; +extern struct class *input_class; #endif #endif -- cgit v1.2.3 From 8561b10f6e7ef0a085709ffc844f74130a067abe Mon Sep 17 00:00:00 2001 From: "gregkh@suse.de" Date: Tue, 15 Mar 2005 15:10:13 -0800 Subject: [PATCH] USB: move the usb hcd code to use the new class code. This moves a kref into the main hcd structure, which detaches it from the class device structure. Signed-off-by: Greg Kroah-Hartman --- include/linux/usb.h | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/usb.h b/include/linux/usb.h index 2d1ac505853..3d508bf0840 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -287,15 +287,14 @@ struct usb_bus { struct dentry *usbfs_dentry; /* usbfs dentry entry for the bus */ - struct class_device class_dev; /* class device for this bus */ + struct class_device *class_dev; /* class device for this bus */ + struct kref kref; /* handles reference counting this bus */ void (*release)(struct usb_bus *bus); /* function to destroy this bus's memory */ #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) struct mon_bus *mon_bus; /* non-null when associated */ int monitored; /* non-zero when monitored */ #endif }; -#define to_usb_bus(d) container_of(d, struct usb_bus, class_dev) - /* -------------------------------------------------------------------------- */ -- cgit v1.2.3 From cd987d38cc59053e0bab8150ffaca33b109067f3 Mon Sep 17 00:00:00 2001 From: "gregkh@suse.de" Date: Wed, 23 Mar 2005 11:12:38 -0800 Subject: [PATCH] class: remove class_simple code, as no one in the tree is using it anymore. Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 73250d01c01..68a95358013 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -44,7 +44,6 @@ struct device; struct device_driver; struct class; struct class_device; -struct class_simple; struct bus_type { const char * name; @@ -254,15 +253,6 @@ extern struct class_device *class_device_create(struct class *cls, dev_t devt, __attribute__((format(printf,4,5))); extern void class_device_destroy(struct class *cls, dev_t devt); -/* interface for class simple stuff */ -extern struct class_simple *class_simple_create(struct module *owner, char *name); -extern void class_simple_destroy(struct class_simple *cs); -extern struct class_device *class_simple_device_add(struct class_simple *cs, dev_t dev, struct device *device, const char *fmt, ...) - __attribute__((format(printf,4,5))); -extern int class_simple_set_hotplug(struct class_simple *, - int (*hotplug)(struct class_device *dev, char **envp, int num_envp, char *buffer, int buffer_size)); -extern void class_simple_device_remove(dev_t dev); - struct device { struct list_head node; /* node in sibling list */ -- cgit v1.2.3 From af70316af182f4716cc5eec7e0d27fc731d164bd Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Mon, 21 Mar 2005 10:41:04 -0800 Subject: [PATCH] Add a semaphore to struct device to synchronize calls to its driver. This adds a per-device semaphore that is taken before every call from the core to a driver method. This prevents e.g. simultaneous calls to the ->suspend() or ->resume() and ->probe() or ->release(), potentially saving a whole lot of headaches. It also moves us a step closer to removing the bus rwsem, since it protects the fields in struct device that are modified by the core. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 68a95358013..195b327f3e1 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -264,6 +264,10 @@ struct device { struct kobject kobj; char bus_id[BUS_ID_SIZE]; /* position on parent bus */ + struct semaphore sem; /* semaphore to synchronize calls to + * its driver. + */ + struct bus_type * bus; /* type of bus device is on */ struct device_driver *driver; /* which driver has allocated this device */ -- cgit v1.2.3 From fae3cd00255e3e51ffd59fedb1bdb91ec96be395 Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Mon, 21 Mar 2005 10:59:56 -0800 Subject: [PATCH] Add driver_for_each_device(). Now there's an iterator for accessing each device bound to a driver. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman Index: linux-2.6.12-rc2/drivers/base/driver.c =================================================================== --- include/linux/device.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 195b327f3e1..10f5aa20e04 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -136,6 +136,9 @@ struct driver_attribute driver_attr_##_name = __ATTR(_name,_mode,_show,_store) extern int driver_create_file(struct device_driver *, struct driver_attribute *); extern void driver_remove_file(struct device_driver *, struct driver_attribute *); +extern int driver_for_each_device(struct device_driver * drv, struct device * start, + void * data, int (*fn)(struct device *, void *)); + /* * device classes -- cgit v1.2.3 From 9a19fea43616066561e221359596ce532e631395 Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Mon, 21 Mar 2005 11:45:16 -0800 Subject: [PATCH] Add initial implementation of klist helpers. This klist interface provides a couple of structures that wrap around struct list_head to provide explicit list "head" (struct klist) and list "node" (struct klist_node) objects. For struct klist, a spinlock is included that protects access to the actual list itself. struct klist_node provides a pointer to the klist that owns it and a kref reference count that indicates the number of current users of that node in the list. The entire point is to provide an interface for iterating over a list that is safe and allows for modification of the list during the iteration (e.g. insertion and removal), including modification of the current node on the list. It works using a 3rd object type - struct klist_iter - that is declared and initialized before an iteration. klist_next() is used to acquire the next element in the list. It returns NULL if there are no more items. This klist interface provides a couple of structures that wrap around struct list_head to provide explicit list "head" (struct klist) and list "node" (struct klist_node) objects. For struct klist, a spinlock is included that protects access to the actual list itself. struct klist_node provides a pointer to the klist that owns it and a kref reference count that indicates the number of current users of that node in the list. The entire point is to provide an interface for iterating over a list that is safe and allows for modification of the list during the iteration (e.g. insertion and removal), including modification of the current node on the list. It works using a 3rd object type - struct klist_iter - that is declared and initialized before an iteration. klist_next() is used to acquire the next element in the list. It returns NULL if there are no more items. Internally, that routine takes the klist's lock, decrements the reference count of the previous klist_node and increments the count of the next klist_node. It then drops the lock and returns. There are primitives for adding and removing nodes to/from a klist. When deleting, klist_del() will simply decrement the reference count. Only when the count goes to 0 is the node removed from the list. klist_remove() will try to delete the node from the list and block until it is actually removed. This is useful for objects (like devices) that have been removed from the system and must be freed (but must wait until all accessors have finished). Internally, that routine takes the klist's lock, decrements the reference count of the previous klist_node and increments the count of the next klist_node. It then drops the lock and returns. There are primitives for adding and removing nodes to/from a klist. When deleting, klist_del() will simply decrement the reference count. Only when the count goes to 0 is the node removed from the list. klist_remove() will try to delete the node from the list and block until it is actually removed. This is useful for objects (like devices) that have been removed from the system and must be freed (but must wait until all accessors have finished). Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman diff -Nru a/include/linux/klist.h b/include/linux/klist.h --- include/linux/klist.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 include/linux/klist.h (limited to 'include') diff --git a/include/linux/klist.h b/include/linux/klist.h new file mode 100644 index 00000000000..fb52f9d9d61 --- /dev/null +++ b/include/linux/klist.h @@ -0,0 +1,53 @@ +/* + * klist.h - Some generic list helpers, extending struct list_head a bit. + * + * Implementations are found in lib/klist.c + * + * + * Copyright (C) 2005 Patrick Mochel + * + * This file is rleased under the GPL v2. + */ + +#include +#include +#include +#include + + +struct klist { + spinlock_t k_lock; + struct list_head k_list; +}; + + +extern void klist_init(struct klist * k); + + +struct klist_node { + struct klist * n_klist; + struct list_head n_node; + struct kref n_ref; + struct completion n_removed; +}; + +extern void klist_add_tail(struct klist * k, struct klist_node * n); +extern void klist_add_head(struct klist * k, struct klist_node * n); + +extern void klist_del(struct klist_node * n); +extern void klist_remove(struct klist_node * n); + + +struct klist_iter { + struct klist * i_klist; + struct list_head * i_head; + struct klist_node * i_cur; +}; + + +extern void klist_iter_init(struct klist * k, struct klist_iter * i); +extern void klist_iter_init_node(struct klist * k, struct klist_iter * i, + struct klist_node * n); +extern void klist_iter_exit(struct klist_iter * i); +extern struct klist_node * klist_next(struct klist_iter * i); + -- cgit v1.2.3 From 465c7a3a3a5aabcedd2e43612cac5a12f23da19a Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Mon, 21 Mar 2005 11:49:14 -0800 Subject: [PATCH] Add a klist to struct bus_type for its devices. - Use it for bus_for_each_dev(). - Use the klist spinlock instead of the bus rwsem. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 10f5aa20e04..e36953cf7f1 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -51,6 +52,7 @@ struct bus_type { struct subsystem subsys; struct kset drivers; struct kset devices; + struct klist klist_devices; struct bus_attribute * bus_attrs; struct device_attribute * dev_attrs; @@ -262,6 +264,7 @@ struct device { struct list_head bus_list; /* node in bus's list */ struct list_head driver_list; struct list_head children; + struct klist_node knode_bus; struct device * parent; struct kobject kobj; -- cgit v1.2.3 From 38fdac3cdce276554b4484a41f8ec2daf81cb2ff Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Mon, 21 Mar 2005 12:00:18 -0800 Subject: [PATCH] Add a klist to struct bus_type for its drivers. - Use it in bus_for_each_drv(). - Use the klist spinlock instead of the bus rwsem. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index e36953cf7f1..ea9ab33dfe7 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -53,6 +53,7 @@ struct bus_type { struct kset drivers; struct kset devices; struct klist klist_devices; + struct klist klist_drivers; struct bus_attribute * bus_attrs; struct device_attribute * dev_attrs; @@ -105,6 +106,7 @@ struct device_driver { struct completion unloaded; struct kobject kobj; struct list_head devices; + struct klist_node knode_bus; struct module * owner; -- cgit v1.2.3 From 94e7b1c5ff2055571703e38b059afffe17658432 Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Mon, 21 Mar 2005 12:25:36 -0800 Subject: [PATCH] Add a klist to struct device_driver for the devices bound to it. - Use it in driver_for_each_device() instead of the regular list_head and stop using the bus's rwsem for protection. - Use driver_for_each_device() in driver_detach() so we don't deadlock on the bus's rwsem. - Remove ->devices. - Move klist access and sysfs link access out from under device's semaphore, since they're synchronized through other means. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index ea9ab33dfe7..96c71b59fde 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -105,7 +105,7 @@ struct device_driver { struct completion unloaded; struct kobject kobj; - struct list_head devices; + struct klist klist_devices; struct klist_node knode_bus; struct module * owner; @@ -266,6 +266,7 @@ struct device { struct list_head bus_list; /* node in bus's list */ struct list_head driver_list; struct list_head children; + struct klist_node knode_driver; struct klist_node knode_bus; struct device * parent; -- cgit v1.2.3 From cb85b6f1cc811ecb9ed4b950206d8941ba710e68 Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Thu, 24 Mar 2005 10:48:35 -0800 Subject: [PATCH] Remove the unused device_find(). Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 96c71b59fde..f1c38d869ac 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -372,7 +372,6 @@ extern int (*platform_notify_remove)(struct device * dev); */ extern struct device * get_device(struct device * dev); extern void put_device(struct device * dev); -extern struct device *device_find(const char *name, struct bus_type *bus); /* drivers/base/platform.c */ -- cgit v1.2.3 From 8b0c250be489dcbf1a3a33bb4ec4c7f33735a365 Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Thu, 24 Mar 2005 12:58:57 -0800 Subject: [PATCH] add klist_node_attached() to determine if a node is on a list or not. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman diff -Nru a/include/linux/klist.h b/include/linux/klist.h --- include/linux/klist.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/linux/klist.h b/include/linux/klist.h index fb52f9d9d61..eebf5e5696e 100644 --- a/include/linux/klist.h +++ b/include/linux/klist.h @@ -37,6 +37,8 @@ extern void klist_add_head(struct klist * k, struct klist_node * n); extern void klist_del(struct klist_node * n); extern void klist_remove(struct klist_node * n); +extern int klist_node_attached(struct klist_node * n); + struct klist_iter { struct klist * i_klist; -- cgit v1.2.3 From 7dc35cdf69149a7f2b5216ada9bafe359746ac1c Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Thu, 24 Mar 2005 13:03:35 -0800 Subject: [PATCH] Remove struct device::bus_list. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index f1c38d869ac..13f65853e58 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -263,7 +263,6 @@ extern void class_device_destroy(struct class *cls, dev_t devt); struct device { struct list_head node; /* node in sibling list */ - struct list_head bus_list; /* node in bus's list */ struct list_head driver_list; struct list_head children; struct klist_node knode_driver; -- cgit v1.2.3 From 63c4f204ffc8219696bda88eb20c9873d007a2fc Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Thu, 24 Mar 2005 13:08:05 -0800 Subject: [PATCH] Remove struct device::driver_list. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 13f65853e58..d2434934d09 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -263,7 +263,6 @@ extern void class_device_destroy(struct class *cls, dev_t devt); struct device { struct list_head node; /* node in sibling list */ - struct list_head driver_list; struct list_head children; struct klist_node knode_driver; struct klist_node knode_bus; -- cgit v1.2.3 From 36239577cfb6b9a7c111209536b54200b0252ebf Mon Sep 17 00:00:00 2001 From: "mochel@digitalimplant.org" Date: Thu, 24 Mar 2005 19:08:30 -0800 Subject: [PATCH] Use a klist for device child lists. - Use klist iterator in device_for_each_child(), making it safe to use for removing devices. - Remove unused list_to_dev() function. - Kills all usage of devices_subsys.rwsem. Signed-off-by: Patrick Mochel Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index d2434934d09..43249260cd1 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -262,8 +262,8 @@ extern void class_device_destroy(struct class *cls, dev_t devt); struct device { - struct list_head node; /* node in sibling list */ - struct list_head children; + struct klist klist_children; + struct klist_node knode_parent; /* node in sibling list */ struct klist_node knode_driver; struct klist_node knode_bus; struct device * parent; @@ -298,12 +298,6 @@ struct device { void (*release)(struct device * dev); }; -static inline struct device * -list_to_dev(struct list_head *node) -{ - return list_entry(node, struct device, node); -} - static inline void * dev_get_drvdata (struct device *dev) { -- cgit v1.2.3 From 0d3e5a2e39b6ba2974e9e7c2a429018c45de8e76 Mon Sep 17 00:00:00 2001 From: Patrick Mochel Date: Tue, 5 Apr 2005 23:46:33 -0700 Subject: [PATCH] Driver Core: fix bk-driver-core kills ppc64 There's no check to see if the device is already bound to a driver, which could do bad things. The first thing to go wrong is that it will try to match a driver with a device already bound to one. In some cases (it appears with USB with drivers/usb/core/usb.c::usb_match_id()), some drivers will match a device based on the class type, so it would be common (especially for HID devices) to match a device that is already bound. The fun comes when ->probe() is called, it fails, then driver_probe_device() does this: dev->driver = NULL; Later on, that pointer could be be dereferenced without checking and cause hell to break loose. This problem could be nasty. It's very hardware dependent, since some devices could have a different set of matching qualifiers than others. Now, I don't quite see exactly where/how you were getting that crash. You're dereferencing bad memory, but I'm not sure which pointer was bad and where it came from, but it could have come from a couple of different places. The patch below will hopefully fix it all up for you. It's against 2.6.12-rc2-mm1, and does the following: - Move logic to driver_probe_device() and comments uncommon returns: 1 - If device is bound 0 - If device not bound, and no error error - If there was an error. - Move locking to caller of that function, since we want to lock a device for the entire time we're trying to bind it to a driver (to prevent against a driver being loaded at the same time). - Update __device_attach() and __driver_attach() to do that locking. - Check if device is already bound in __driver_attach() - Update the converse device_release_driver() so it locks the device around all of the operations. - Mark driver_probe_device() as static and remove export. It's an internal function, it should stay that way, and there are no other callers. If there is ever a need to export it, we can audit it as necessary. Signed-off-by: Andrew Morton --- include/linux/device.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 43249260cd1..91aac349b9a 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -325,7 +325,6 @@ extern int device_for_each_child(struct device *, void *, * Manual binding of a device to driver. See drivers/base/bus.c * for information on use. */ -extern int driver_probe_device(struct device_driver * drv, struct device * dev); extern void device_bind_driver(struct device * dev); extern void device_release_driver(struct device * dev); extern int device_attach(struct device * dev); -- cgit v1.2.3 From 4b45099b75832434c5113b9aed1499f8a69d13d5 Mon Sep 17 00:00:00 2001 From: Keiichiro Tokunaga Date: Sun, 8 May 2005 21:28:53 +0900 Subject: [PATCH] Driver core: unregister_node() for hotplug use This adds a generic function 'unregister_node()'. It is used to remove objects of a node going away for hotplug. All the devices on the node must be unregistered before calling this function. Signed-off-by: Keiichiro Tokunaga Signed-off-by: Greg Kroah-Hartman diff -puN drivers/base/node.c~numa_hp_base drivers/base/node.c --- include/linux/node.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/node.h b/include/linux/node.h index 6e0a697e594..254dc3de650 100644 --- a/include/linux/node.h +++ b/include/linux/node.h @@ -27,6 +27,7 @@ struct node { }; extern int register_node(struct node *, int, struct node *); +extern void unregister_node(struct node *node); #define to_node(sys_device) container_of(sys_device, struct node, sysdev) -- cgit v1.2.3 From acaefc25d21f850e47ecc5098d1e0bc442c526be Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Wed, 18 May 2005 14:40:59 +0200 Subject: [PATCH] libfs: add simple attribute files Based on the discussion about spufs attributes, this is my suggestion for a more generic attribute file support that can be used by both debugfs and spufs. Simple attribute files behave similarly to sequential files from a kernel programmers perspective in that a standard set of file operations is provided and only an open operation needs to be written that registers file specific get() and set() functions. These operations are defined as void foo_set(void *data, u64 val); and u64 foo_get(void *data); where data is the inode->u.generic_ip pointer of the file and the operations just need to make send of that pointer. The infrastructure makes sure this works correctly with concurrent access and partial read calls. A macro named DEFINE_SIMPLE_ATTRIBUTE is provided to further simplify using the attributes. This patch already contains the changes for debugfs to use attributes for its internal file operations. Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- include/linux/fs.h | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) (limited to 'include') diff --git a/include/linux/fs.h b/include/linux/fs.h index 0180102dace..9b8b696d4f1 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1657,6 +1657,52 @@ static inline void simple_transaction_set(struct file *file, size_t n) ar->size = n; } +/* + * simple attribute files + * + * These attributes behave similar to those in sysfs: + * + * Writing to an attribute immediately sets a value, an open file can be + * written to multiple times. + * + * Reading from an attribute creates a buffer from the value that might get + * read with multiple read calls. When the attribute has been read + * completely, no further read calls are possible until the file is opened + * again. + * + * All attributes contain a text representation of a numeric value + * that are accessed with the get() and set() functions. + */ +#define DEFINE_SIMPLE_ATTRIBUTE(__fops, __get, __set, __fmt) \ +static int __fops ## _open(struct inode *inode, struct file *file) \ +{ \ + __simple_attr_check_format(__fmt, 0ull); \ + return simple_attr_open(inode, file, __get, __set, __fmt); \ +} \ +static struct file_operations __fops = { \ + .owner = THIS_MODULE, \ + .open = __fops ## _open, \ + .release = simple_attr_close, \ + .read = simple_attr_read, \ + .write = simple_attr_write, \ +}; + +static inline void __attribute__((format(printf, 1, 2))) +__simple_attr_check_format(const char *fmt, ...) +{ + /* don't do anything, just let the compiler check the arguments; */ +} + +int simple_attr_open(struct inode *inode, struct file *file, + u64 (*get)(void *), void (*set)(void *, u64), + const char *fmt); +int simple_attr_close(struct inode *inode, struct file *file); +ssize_t simple_attr_read(struct file *file, char __user *buf, + size_t len, loff_t *ppos); +ssize_t simple_attr_write(struct file *file, const char __user *buf, + size_t len, loff_t *ppos); + + #ifdef CONFIG_SECURITY static inline char *alloc_secdata(void) { -- cgit v1.2.3 From 54b6f35c99974e99e64c05c2895718355123c55f Mon Sep 17 00:00:00 2001 From: Yani Ioannou Date: Tue, 17 May 2005 06:39:34 -0400 Subject: [PATCH] Driver core: change device_attribute callbacks This patch adds the device_attribute paramerter to the device_attribute store and show sysfs callback functions, and passes a reference to the attribute when the callbacks are called. Signed-off-by: Yani Ioannou Signed-off-by: Greg Kroah-Hartman --- include/linux/device.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/linux/device.h b/include/linux/device.h index 91aac349b9a..7b781a72b29 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -335,8 +335,10 @@ extern void driver_attach(struct device_driver * drv); struct device_attribute { struct attribute attr; - ssize_t (*show)(struct device * dev, char * buf); - ssize_t (*store)(struct device * dev, const char * buf, size_t count); + ssize_t (*show)(struct device *dev, struct device_attribute *attr, + char *buf); + ssize_t (*store)(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count); }; #define DEVICE_ATTR(_name,_mode,_show,_store) \ -- cgit v1.2.3 From f2d03e1b3f00f1c5971463ab0101bef0c521ad3b Mon Sep 17 00:00:00 2001 From: Yani Ioannou Date: Tue, 17 May 2005 06:44:59 -0400 Subject: [PATCH] Driver Core: include: update device attribute callbacks Signed-off-by: Yani Ioannou Signed-off-by: Greg Kroah-Hartman --- include/asm-ppc/ocp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/asm-ppc/ocp.h b/include/asm-ppc/ocp.h index b98db3cdae8..c726f184519 100644 --- a/include/asm-ppc/ocp.h +++ b/include/asm-ppc/ocp.h @@ -189,7 +189,7 @@ extern void ocp_for_each_device(void(*callback)(struct ocp_device *, void *arg), /* Sysfs support */ #define OCP_SYSFS_ADDTL(type, format, name, field) \ static ssize_t \ -show_##name##_##field(struct device *dev, char *buf) \ +show_##name##_##field(struct device *dev, struct device_attribute *attr, char *buf) \ { \ struct ocp_device *odev = to_ocp_dev(dev); \ type *add = odev->def->additions; \ -- cgit v1.2.3 From 0a3e7eeabc9f76b7496488aad2d11626ff6a2a4f Mon Sep 17 00:00:00 2001 From: Yani Ioannou Date: Tue, 17 May 2005 22:59:05 -0400 Subject: [PATCH] I2C: add i2c sensor_device_attribute and macros This patch creates a new header with a potential standard i2c sensor attribute type (which simply includes an int representing the sensor number/index) and the associated macros, SENSOR_DEVICE_ATTR to define a static attribute and to_sensor_dev_attr to get a sensor_device_attribute reference from an embedded device_attribute reference. Signed-off-by: Yani Ioannou --- include/linux/i2c-sysfs.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 include/linux/i2c-sysfs.h (limited to 'include') diff --git a/include/linux/i2c-sysfs.h b/include/linux/i2c-sysfs.h new file mode 100644 index 00000000000..d7bf6ce1167 --- /dev/null +++ b/include/linux/i2c-sysfs.h @@ -0,0 +1,36 @@ +/* + * i2c-sysfs.h - i2c chip driver sysfs defines + * + * Copyright (C) 2005 Yani Ioannou + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#ifndef _LINUX_I2C_SYSFS_H +#define _LINUX_I2C_SYSFS_H + +struct sensor_device_attribute{ + struct device_attribute dev_attr; + int index; +}; +#define to_sensor_dev_attr(_dev_attr) \ + container_of(_dev_attr, struct sensor_device_attribute, dev_attr) + +#define SENSOR_DEVICE_ATTR(_name,_mode,_show,_store,_index) \ +struct sensor_device_attribute sensor_dev_attr_##_name = { \ + .dev_attr = __ATTR(_name,_mode,_show,_store), \ + .index = _index, \ +} + +#endif /* _LINUX_I2C_SYSFS_H */ -- cgit v1.2.3 From 988d186de5b6966a71a8cc52e6cb4895fd2f7799 Mon Sep 17 00:00:00 2001 From: Maneesh Soni Date: Tue, 31 May 2005 10:39:14 +0530 Subject: [PATCH] sysfs-iattr: add sysfs_setattr o This adds ->i_op->setattr VFS method for sysfs inodes. The changed attribues are saved in the persistent sysfs_dirent structure as a pointer to struct iattr. The struct iattr is allocated only for those sysfs_dirent's for which default attributes are getting changed. Thanks to Jon Smirl for this suggestion. Signed-off-by: Maneesh Soni Signed-off-by: Greg Kroah-Hartman --- include/linux/sysfs.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h index d9cd2d31d37..392da5a6dac 100644 --- a/include/linux/sysfs.h +++ b/include/linux/sysfs.h @@ -73,6 +73,7 @@ struct sysfs_dirent { int s_type; umode_t s_mode; struct dentry * s_dentry; + struct iattr * s_iattr; }; #define SYSFS_ROOT 0x0001 -- cgit v1.2.3