3282570990
Now that the SPDX tag is in all driver core files, that identifies the license in a specific and legally-defined manner. So the extra GPL text wording can be removed as it is no longer needed at all. This is done on a quest to remove the 700+ different ways that files in the kernel describe the GPL license text. And there's unneeded stuff like the address (sometimes incorrect) for the FSF which is never needed. No copyright headers or other non-license-description text was removed. Cc: Johannes Berg <johannes@sipsolutions.net> Cc: "Luis R. Rodriguez" <mcgrof@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
94 lines
2 KiB
C
94 lines
2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* module.c - module sysfs fun for drivers
|
|
*/
|
|
#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);
|
|
}
|
|
}
|
|
}
|