f2fs: avoid naming confusion of sysfs init

This patch changes the function names of sysfs init to follow ext4.

f2fs_init_sysfs <-> f2fs_register_sysfs
f2fs_exit_sysfs <-> f2fs_unregister_sysfs

Suggested-by: Chao Yu <yuchao0@huawei.com>
Reivewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index 584d0c7..66163e5 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -649,7 +649,7 @@
 
 	kfree(sbi->ckpt);
 
-	f2fs_exit_sysfs(sbi);
+	f2fs_unregister_sysfs(sbi);
 
 	sb->s_fs_info = NULL;
 	if (sbi->s_chksum_driver)
@@ -2149,7 +2149,7 @@
 		goto free_root_inode;
 	}
 
-	err = f2fs_init_sysfs(sbi);
+	err = f2fs_register_sysfs(sbi);
 	if (err)
 		goto free_root_inode;
 
@@ -2220,7 +2220,7 @@
 
 free_sysfs:
 	f2fs_sync_inode_meta(sbi);
-	f2fs_exit_sysfs(sbi);
+	f2fs_unregister_sysfs(sbi);
 free_root_inode:
 	dput(sb->s_root);
 	sb->s_root = NULL;
@@ -2338,7 +2338,7 @@
 	err = create_extent_cache();
 	if (err)
 		goto free_checkpoint_caches;
-	err = f2fs_register_sysfs();
+	err = f2fs_init_sysfs();
 	if (err)
 		goto free_extent_cache;
 	err = register_shrinker(&f2fs_shrinker_info);
@@ -2357,7 +2357,7 @@
 free_shrinker:
 	unregister_shrinker(&f2fs_shrinker_info);
 free_sysfs:
-	f2fs_unregister_sysfs();
+	f2fs_exit_sysfs();
 free_extent_cache:
 	destroy_extent_cache();
 free_checkpoint_caches:
@@ -2377,7 +2377,7 @@
 	f2fs_destroy_root_stats();
 	unregister_filesystem(&f2fs_fs_type);
 	unregister_shrinker(&f2fs_shrinker_info);
-	f2fs_unregister_sysfs();
+	f2fs_exit_sysfs();
 	destroy_extent_cache();
 	destroy_checkpoint_caches();
 	destroy_segment_manager_caches();