1 files changed, 6 insertions, 11 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 982152d3f920..89116afda7a2 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -1465,12 +1465,11 @@ int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
  *
  * Return: 0 if extent is not shared, 1 if it is shared, < 0 on error.
  */
-int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
+int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr,
+                struct ulist *roots, struct ulist *tmp)
 {
         struct btrfs_fs_info *fs_info = root->fs_info;
         struct btrfs_trans_handle *trans;
-        struct ulist *tmp = NULL;
-        struct ulist *roots = NULL;
         struct ulist_iterator uiter;
         struct ulist_node *node;
         struct seq_list elem = SEQ_LIST_INIT(elem);
@@ -1481,12 +1480,8 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
                 .share_count = 0,
         };
 
-        tmp = ulist_alloc(GFP_NOFS);
-        roots = ulist_alloc(GFP_NOFS);
-        if (!tmp || !roots) {
-                ret = -ENOMEM;
-                goto out;
-        }
+        ulist_init(roots);
+        ulist_init(tmp);
 
         trans = btrfs_attach_transaction(root);
         if (IS_ERR(trans)) {
@@ -1527,8 +1522,8 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
                 up_read(&fs_info->commit_root_sem);
         }
 out:
-        ulist_free(tmp);
-        ulist_free(roots);
+        ulist_release(roots);
+        ulist_release(tmp);
         return ret;
 }