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yaml --- r: 75838 b: refs/heads/master c: c63469a h: refs/heads/master v: v3
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Greg Kroah-Hartman
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Jan 25, 2008
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Original file line number | Diff line number | Diff line change |
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@@ -1,2 +1,2 @@ | ||
--- | ||
refs/heads/master: cbe9c595f1de2e2a98403be2c14bfbc2486e84c4 | ||
refs/heads/master: c63469a3985a9771c18a916b8d42845d044ea0b1 |
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Original file line number | Diff line number | Diff line change |
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/* | ||
* 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/string.h> | ||
#include "base.h" | ||
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static char *make_driver_name(struct device_driver *drv) | ||
{ | ||
char *driver_name; | ||
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driver_name = kmalloc(strlen(drv->name) + strlen(drv->bus->name) + 2, | ||
GFP_KERNEL); | ||
if (!driver_name) | ||
return NULL; | ||
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sprintf(driver_name, "%s:%s", drv->bus->name, drv->name); | ||
return driver_name; | ||
} | ||
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static void module_create_drivers_dir(struct module_kobject *mk) | ||
{ | ||
if (!mk || mk->drivers_dir) | ||
return; | ||
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mk->drivers_dir = kobject_create_and_add("drivers", &mk->kobj); | ||
} | ||
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void module_add_driver(struct module *mod, struct device_driver *drv) | ||
{ | ||
char *driver_name; | ||
int no_warn; | ||
struct module_kobject *mk = NULL; | ||
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if (!drv) | ||
return; | ||
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if (mod) | ||
mk = &mod->mkobj; | ||
else if (drv->mod_name) { | ||
struct kobject *mkobj; | ||
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/* 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->mkobj = mk; | ||
/* kset_find_obj took a reference */ | ||
kobject_put(mkobj); | ||
} | ||
} | ||
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if (!mk) | ||
return; | ||
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/* Don't check return codes; these calls are idempotent */ | ||
no_warn = sysfs_create_link(&drv->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->kobj, | ||
driver_name); | ||
kfree(driver_name); | ||
} | ||
} | ||
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void module_remove_driver(struct device_driver *drv) | ||
{ | ||
struct module_kobject *mk = NULL; | ||
char *driver_name; | ||
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if (!drv) | ||
return; | ||
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sysfs_remove_link(&drv->kobj, "module"); | ||
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if (drv->owner) | ||
mk = &drv->owner->mkobj; | ||
else if (drv->mkobj) | ||
mk = drv->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); | ||
} | ||
} | ||
} |
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