1 files changed, 12 insertions, 16 deletions

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index f3187938e08..208d8aa5b07 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -283,9 +283,7 @@ static int __resolve_indirect_ref(struct btrfs_fs_info *fs_info,
                 goto out;
         }
 
-        rcu_read_lock();
-        root_level = btrfs_header_level(root->node);
-        rcu_read_unlock();
+        root_level = btrfs_old_root_level(root, time_seq);
 
         if (root_level + 1 == level)
                 goto out;
@@ -1177,16 +1175,15 @@ int btrfs_find_one_extref(struct btrfs_root *root, u64 inode_objectid,
         return ret;
 }
 
-static char *ref_to_path(struct btrfs_root *fs_root,
-                         struct btrfs_path *path,
-                         u32 name_len, unsigned long name_off,
-                         struct extent_buffer *eb_in, u64 parent,
-                         char *dest, u32 size)
+char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
+                        u32 name_len, unsigned long name_off,
+                        struct extent_buffer *eb_in, u64 parent,
+                        char *dest, u32 size)
 {
         int slot;
         u64 next_inum;
         int ret;
-        s64 bytes_left = size - 1;
+        s64 bytes_left = ((s64)size) - 1;
         struct extent_buffer *eb = eb_in;
         struct btrfs_key found_key;
         int leave_spinning = path->leave_spinning;
@@ -1266,10 +1263,10 @@ char *btrfs_iref_to_path(struct btrfs_root *fs_root,
                          struct extent_buffer *eb_in, u64 parent,
                          char *dest, u32 size)
 {
-        return ref_to_path(fs_root, path,
-                           btrfs_inode_ref_name_len(eb_in, iref),
-                           (unsigned long)(iref + 1),
-                           eb_in, parent, dest, size);
+        return btrfs_ref_to_path(fs_root, path,
+                                 btrfs_inode_ref_name_len(eb_in, iref),
+                                 (unsigned long)(iref + 1),
+                                 eb_in, parent, dest, size);
 }
 
 /*
@@ -1715,9 +1712,8 @@ static int inode_to_path(u64 inum, u32 name_len, unsigned long name_off,
                                         ipath->fspath->bytes_left - s_ptr : 0;
 
         fspath_min = (char *)ipath->fspath->val + (i + 1) * s_ptr;
-        fspath = ref_to_path(ipath->fs_root, ipath->btrfs_path, name_len,
-                             name_off, eb, inum, fspath_min,
-                             bytes_left);
+        fspath = btrfs_ref_to_path(ipath->fs_root, ipath->btrfs_path, name_len,
+                                   name_off, eb, inum, fspath_min, bytes_left);
         if (IS_ERR(fspath))
                 return PTR_ERR(fspath);