mm/zswap: remove _init in the initialization

hulk inclusion
category: bugfix
bugzilla: 187468, https://gitee.com/openeuler/kernel/issues/I61HSG

--------------------------------

As zswap can be init after system startup, the __init label should be
removed.
Signed-off-by: NLiu Shixin <liushixin2@huawei.com>

mm/zswap.c

@@ -266,13 +266,13 @@ static void zswap_update_total_size(void)
 **********************************/
 static struct kmem_cache *zswap_entry_cache;
 
-static int __init zswap_entry_cache_create(void)
+static int zswap_entry_cache_create(void)
 {
 	zswap_entry_cache = KMEM_CACHE(zswap_entry, 0);
 	return zswap_entry_cache == NULL;
 }
 
-static void __init zswap_entry_cache_destroy(void)
+static void zswap_entry_cache_destroy(void)
 {
 	kmem_cache_destroy(zswap_entry_cache);
 }
@@ -653,7 +653,7 @@ static struct zswap_pool *zswap_pool_create(char *type, char *compressor)
 	return NULL;
 }
 
-static __init struct zswap_pool *__zswap_pool_create_fallback(void)
+static struct zswap_pool *__zswap_pool_create_fallback(void)
 {
 	bool has_comp, has_zpool;
 
@@ -1409,7 +1409,7 @@ static struct frontswap_ops zswap_frontswap_ops = {
 
 static struct dentry *zswap_debugfs_root;
 
-static int __init zswap_debugfs_init(void)
+static int zswap_debugfs_init(void)
 {
 	if (!debugfs_initialized())
 		return -ENODEV;
@@ -1445,7 +1445,7 @@ static void __exit zswap_debugfs_exit(void)
 	debugfs_remove_recursive(zswap_debugfs_root);
 }
 #else
-static int __init zswap_debugfs_init(void)
+static int zswap_debugfs_init(void)
 {
 	return 0;
 }