2 * module.c - module sysfs fun for drivers
4 * This file is released under the GPLv2
7 #include <linux/device.h>
8 #include <linux/module.h>
9 #include <linux/errno.h>
10 #include <linux/slab.h>
11 #include <linux/string.h>
14 static char *make_driver_name(struct device_driver *drv)
18 driver_name = kasprintf(GFP_KERNEL, "%s:%s", drv->bus->name, drv->name);
25 static void module_create_drivers_dir(struct module_kobject *mk)
27 static DEFINE_MUTEX(drivers_dir_mutex);
29 mutex_lock(&drivers_dir_mutex);
30 if (mk && !mk->drivers_dir)
31 mk->drivers_dir = kobject_create_and_add("drivers", &mk->kobj);
32 mutex_unlock(&drivers_dir_mutex);
35 void module_add_driver(struct module *mod, struct device_driver *drv)
39 struct module_kobject *mk = NULL;
46 else if (drv->mod_name) {
47 struct kobject *mkobj;
49 /* Lookup built-in module entry in /sys/modules */
50 mkobj = kset_find_obj(module_kset, drv->mod_name);
52 mk = container_of(mkobj, struct module_kobject, kobj);
53 /* remember our module structure */
55 /* kset_find_obj took a reference */
63 /* Don't check return codes; these calls are idempotent */
64 no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
65 driver_name = make_driver_name(drv);
67 module_create_drivers_dir(mk);
68 no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj,
74 void module_remove_driver(struct device_driver *drv)
76 struct module_kobject *mk = NULL;
82 sysfs_remove_link(&drv->p->kobj, "module");
85 mk = &drv->owner->mkobj;
86 else if (drv->p->mkobj)
88 if (mk && mk->drivers_dir) {
89 driver_name = make_driver_name(drv);
91 sysfs_remove_link(mk->drivers_dir, driver_name);