btrfs: rename err to ret in btrfs_recover_relocation()

Fix coding style: rename the return variable to 'ret' in the function
btrfs_recover_relocation instead of 'err'.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/relocation.c

@@ -4221,7 +4221,7 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 	struct reloc_control *rc = NULL;
 	struct btrfs_trans_handle *trans;
 	int ret2;
-	int err = 0;
+	int ret = 0;
 
 	path = btrfs_alloc_path();
 	if (!path)
@@ -4233,16 +4233,16 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 	key.offset = (u64)-1;
 
 	while (1) {
-		err = btrfs_search_slot(NULL, fs_info->tree_root, &key,
+		ret = btrfs_search_slot(NULL, fs_info->tree_root, &key,
 					path, 0, 0);
-		if (err < 0)
+		if (ret < 0)
 			goto out;
-		if (err > 0) {
+		if (ret > 0) {
 			if (path->slots[0] == 0)
 				break;
 			path->slots[0]--;
 		}
-		err = 0;
+		ret = 0;
 		leaf = path->nodes[0];
 		btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
 		btrfs_release_path(path);
@@ -4253,7 +4253,7 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 
 		reloc_root = btrfs_read_tree_root(fs_info->tree_root, &key);
 		if (IS_ERR(reloc_root)) {
-			err = PTR_ERR(reloc_root);
+			ret = PTR_ERR(reloc_root);
 			goto out;
 		}
 
@@ -4264,13 +4264,13 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 			fs_root = btrfs_get_fs_root(fs_info,
 					reloc_root->root_key.offset, false);
 			if (IS_ERR(fs_root)) {
-				err = PTR_ERR(fs_root);
-				if (err != -ENOENT)
+				ret = PTR_ERR(fs_root);
+				if (ret != -ENOENT)
 					goto out;
-				err = mark_garbage_root(reloc_root);
-				if (err < 0)
+				ret = mark_garbage_root(reloc_root);
+				if (ret < 0)
 					goto out;
-				err = 0;
+				ret = 0;
 			} else {
 				btrfs_put_root(fs_root);
 			}
@@ -4288,12 +4288,12 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 
 	rc = alloc_reloc_control(fs_info);
 	if (!rc) {
-		err = -ENOMEM;
+		ret = -ENOMEM;
 		goto out;
 	}
 
-	err = reloc_chunk_start(fs_info);
-	if (err < 0)
+	ret = reloc_chunk_start(fs_info);
+	if (ret < 0)
 		goto out_end;
 
 	rc->extent_root = btrfs_extent_root(fs_info, 0);
@@ -4302,7 +4302,7 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 
 	trans = btrfs_join_transaction(rc->extent_root);
 	if (IS_ERR(trans)) {
-		err = PTR_ERR(trans);
+		ret = PTR_ERR(trans);
 		goto out_unset;
 	}
 
@@ -4322,15 +4322,15 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 		fs_root = btrfs_get_fs_root(fs_info, reloc_root->root_key.offset,
 					    false);
 		if (IS_ERR(fs_root)) {
-			err = PTR_ERR(fs_root);
+			ret = PTR_ERR(fs_root);
 			list_add_tail(&reloc_root->root_list, &reloc_roots);
 			btrfs_end_transaction(trans);
 			goto out_unset;
 		}
 
-		err = __add_reloc_root(reloc_root);
-		ASSERT(err != -EEXIST);
-		if (err) {
+		ret = __add_reloc_root(reloc_root);
+		ASSERT(ret != -EEXIST);
+		if (ret) {
 			list_add_tail(&reloc_root->root_list, &reloc_roots);
 			btrfs_put_root(fs_root);
 			btrfs_end_transaction(trans);
@@ -4340,8 +4340,8 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 		btrfs_put_root(fs_root);
 	}
 
-	err = btrfs_commit_transaction(trans);
-	if (err)
+	ret = btrfs_commit_transaction(trans);
+	if (ret)
 		goto out_unset;
 
 	merge_reloc_roots(rc);
@@ -4350,14 +4350,14 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 
 	trans = btrfs_join_transaction(rc->extent_root);
 	if (IS_ERR(trans)) {
-		err = PTR_ERR(trans);
+		ret = PTR_ERR(trans);
 		goto out_clean;
 	}
-	err = btrfs_commit_transaction(trans);
+	ret = btrfs_commit_transaction(trans);
 out_clean:
 	ret2 = clean_dirty_subvols(rc);
-	if (ret2 < 0 && !err)
-		err = ret2;
+	if (ret2 < 0 && !ret)
+		ret = ret2;
 out_unset:
 	unset_reloc_control(rc);
 out_end:
@@ -4368,14 +4368,14 @@ int btrfs_recover_relocation(struct btrfs_fs_info *fs_info)
 
 	btrfs_free_path(path);
 
-	if (err == 0) {
+	if (ret == 0) {
 		/* cleanup orphan inode in data relocation tree */
 		fs_root = btrfs_grab_root(fs_info->data_reloc_root);
 		ASSERT(fs_root);
-		err = btrfs_orphan_cleanup(fs_root);
+		ret = btrfs_orphan_cleanup(fs_root);
 		btrfs_put_root(fs_root);
 	}
-	return err;
+	return ret;
 }
 
 /*