Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable:
  Btrfs: The file argument for fsync() is never null
  Btrfs: handle ERR_PTR from posix_acl_from_xattr()
  Btrfs: avoid BUG when dropping root and reference in same transaction
  Btrfs: prohibit a operation of changing acl's mask when noacl mount option used
  Btrfs: should add a permission check for setfacl
  Btrfs: btrfs_lookup_dir_item() can return ERR_PTR
  Btrfs: btrfs_read_fs_root_no_name() returns ERR_PTRs
  Btrfs: unwind after btrfs_start_transaction() errors
  Btrfs: btrfs_iget() returns ERR_PTR
  Btrfs: handle kzalloc() failure in open_ctree()
  Btrfs: handle error returns from btrfs_lookup_dir_item()
  Btrfs: Fix BUG_ON for fs converted from extN
  Btrfs: Fix null dereference in relocation.c
  Btrfs: fix remap_file_pages error
  Btrfs: uninitialized data is check_path_shared()
  Btrfs: fix fallocate regression
  Btrfs: fix loop device on top of btrfs

1 files changed, 4 insertions, 3 deletions

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 05d41e569236..b37d723b9d4a 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -784,16 +784,17 @@ again:
                                 struct btrfs_extent_ref_v0 *ref0;
                                 ref0 = btrfs_item_ptr(eb, path1->slots[0],
                                                 struct btrfs_extent_ref_v0);
-                                root = find_tree_root(rc, eb, ref0);
-                                if (!root->ref_cows)
-                                        cur->cowonly = 1;
                                 if (key.objectid == key.offset) {
+                                        root = find_tree_root(rc, eb, ref0);
                                         if (root && !should_ignore_root(root))
                                                 cur->root = root;
                                         else
                                                 list_add(&cur->list, &useless);
                                         break;
                                 }
+                                if (is_cowonly_root(btrfs_ref_root_v0(eb,
+                                                                      ref0)))
+                                        cur->cowonly = 1;
                         }
 #else
                 BUG_ON(key.type == BTRFS_EXTENT_REF_V0_KEY);