Modules: only add drivers/ direcory if needed
This changes the module core to only create the drivers/ directory if we
are going to put something in it.
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/kernel/module.c b/kernel/module.c
index 0f4489a..9de4209 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1131,12 +1131,6 @@
if (err)
goto out;
- mod->mkobj.drivers_dir = kobject_add_dir(&mod->mkobj.kobj, "drivers");
- if (!mod->mkobj.drivers_dir) {
- err = -ENOMEM;
- goto out_unreg;
- }
-
err = module_param_sysfs_setup(mod, kparam, num_params);
if (err)
goto out_unreg_drivers;
@@ -1151,8 +1145,6 @@
out_unreg_param:
module_param_sysfs_remove(mod);
out_unreg_drivers:
- kobject_unregister(mod->mkobj.drivers_dir);
-out_unreg:
kobject_del(&mod->mkobj.kobj);
kobject_put(&mod->mkobj.kobj);
out:
@@ -1163,7 +1155,8 @@
{
module_remove_modinfo_attrs(mod);
module_param_sysfs_remove(mod);
- kobject_unregister(mod->mkobj.drivers_dir);
+ if (mod->mkobj.drivers_dir)
+ kobject_unregister(mod->mkobj.drivers_dir);
kobject_unregister(&mod->mkobj.kobj);
}
@@ -2340,6 +2333,14 @@
return driver_name;
}
+static void module_create_drivers_dir(struct module_kobject *mk)
+{
+ if (!mk || mk->drivers_dir)
+ return;
+
+ mk->drivers_dir = kobject_add_dir(&mk->kobj, "drivers");
+}
+
void module_add_driver(struct module *mod, struct device_driver *drv)
{
char *driver_name;
@@ -2367,6 +2368,7 @@
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);