mirror of
https://github.com/torvalds/linux.git
synced 2024-11-24 13:11:40 +00:00
989d42e85d
It's good to have SPDX identifiers in all files to make it easier to audit the kernel tree for correct licenses. Update the driver core files files with the correct SPDX license identifier based on the license text in the file itself. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This work is based on a script and data from Thomas Gleixner, Philippe Ombredanne, and Kate Stewart. Cc: Johannes Berg <johannes@sipsolutions.net> Cc: "Luis R. Rodriguez" <mcgrof@kernel.org> Cc: William Breathitt Gray <vilhelm.gray@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: Philippe Ombredanne <pombredanne@nexb.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* module.c - module sysfs fun for drivers
|
|
*
|
|
* This file is released under the GPLv2
|
|
*
|
|
*/
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/string.h>
|
|
#include "base.h"
|
|
|
|
static char *make_driver_name(struct device_driver *drv)
|
|
{
|
|
char *driver_name;
|
|
|
|
driver_name = kasprintf(GFP_KERNEL, "%s:%s", drv->bus->name, drv->name);
|
|
if (!driver_name)
|
|
return NULL;
|
|
|
|
return driver_name;
|
|
}
|
|
|
|
static void module_create_drivers_dir(struct module_kobject *mk)
|
|
{
|
|
static DEFINE_MUTEX(drivers_dir_mutex);
|
|
|
|
mutex_lock(&drivers_dir_mutex);
|
|
if (mk && !mk->drivers_dir)
|
|
mk->drivers_dir = kobject_create_and_add("drivers", &mk->kobj);
|
|
mutex_unlock(&drivers_dir_mutex);
|
|
}
|
|
|
|
void module_add_driver(struct module *mod, struct device_driver *drv)
|
|
{
|
|
char *driver_name;
|
|
int no_warn;
|
|
struct module_kobject *mk = NULL;
|
|
|
|
if (!drv)
|
|
return;
|
|
|
|
if (mod)
|
|
mk = &mod->mkobj;
|
|
else if (drv->mod_name) {
|
|
struct kobject *mkobj;
|
|
|
|
/* Lookup built-in module entry in /sys/modules */
|
|
mkobj = kset_find_obj(module_kset, drv->mod_name);
|
|
if (mkobj) {
|
|
mk = container_of(mkobj, struct module_kobject, kobj);
|
|
/* remember our module structure */
|
|
drv->p->mkobj = mk;
|
|
/* kset_find_obj took a reference */
|
|
kobject_put(mkobj);
|
|
}
|
|
}
|
|
|
|
if (!mk)
|
|
return;
|
|
|
|
/* Don't check return codes; these calls are idempotent */
|
|
no_warn = sysfs_create_link(&drv->p->kobj, &mk->kobj, "module");
|
|
driver_name = make_driver_name(drv);
|
|
if (driver_name) {
|
|
module_create_drivers_dir(mk);
|
|
no_warn = sysfs_create_link(mk->drivers_dir, &drv->p->kobj,
|
|
driver_name);
|
|
kfree(driver_name);
|
|
}
|
|
}
|
|
|
|
void module_remove_driver(struct device_driver *drv)
|
|
{
|
|
struct module_kobject *mk = NULL;
|
|
char *driver_name;
|
|
|
|
if (!drv)
|
|
return;
|
|
|
|
sysfs_remove_link(&drv->p->kobj, "module");
|
|
|
|
if (drv->owner)
|
|
mk = &drv->owner->mkobj;
|
|
else if (drv->p->mkobj)
|
|
mk = drv->p->mkobj;
|
|
if (mk && mk->drivers_dir) {
|
|
driver_name = make_driver_name(drv);
|
|
if (driver_name) {
|
|
sysfs_remove_link(mk->drivers_dir, driver_name);
|
|
kfree(driver_name);
|
|
}
|
|
}
|
|
}
|