module: remove redundant module_sysfs_initialized variable

The variable module_sysfs_initialized is used for checking whether
module_kset has been initialized. Checking module_kset itself works
just fine for that.

This is a leftover from commit 7405c1e ("kset: convert /sys/module
to use kset_create").

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
[mcgrof: adjusted commit log as suggested by Christophe Leroy]
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

include/linux/module.h

@@ -827,7 +827,6 @@ void *dereference_module_function_descriptor(struct module *mod, void *ptr)
 #ifdef CONFIG_SYSFS
 extern struct kset *module_kset;
 extern struct kobj_type module_ktype;
-extern int module_sysfs_initialized;
 #endif /* CONFIG_SYSFS */
 
 #define symbol_request(x) try_then_request_module(symbol_get(x), "symbol:" #x)

kernel/module/sysfs.c

@@ -340,7 +340,7 @@ static int mod_sysfs_init(struct module *mod)
 	int err;
 	struct kobject *kobj;
 
-	if (!module_sysfs_initialized) {
+	if (!module_kset) {
 		pr_err("%s: module sysfs not initialized\n", mod->name);
 		err = -EINVAL;
 		goto out;

kernel/params.c

@@ -940,7 +940,6 @@ static const struct kset_uevent_ops module_uevent_ops = {
 };
 
 struct kset *module_kset;
-int module_sysfs_initialized;
 
 static void module_kobj_release(struct kobject *kobj)
 {
@@ -964,7 +963,6 @@ static int __init param_sysfs_init(void)
 			__FILE__, __LINE__);
 		return -ENOMEM;
 	}
-	module_sysfs_initialized = 1;
 
 	version_sysfs_builtin();
 	param_sysfs_builtin();