btrfs-progs: kill BUG_ON in readahead_tree_block()

David sent a quick patch that removed a BUG_ON().  I took a peek and
found that the function was already leaking an eb ref and only returned
0.  So this fixes the leak and makes the function void and fixes up the
callers.

Accidentally-motivated-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Zach Brown <zab@zabbo.net>
Signed-off-by: David Sterba <dsterba@suse.cz>

1 files changed, 2 insertions, 2 deletions

diff --git a/disk-io.h b/disk-io.h
index 13d4420a..c2960558 100644
--- a/disk-io.h
+++ b/disk-io.h
@@ -48,8 +48,8 @@ struct btrfs_device;
 int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror);
 struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
 				      u32 blocksize, u64 parent_transid);
-int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
-			 u64 parent_transid);
+void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
+			  u64 parent_transid);
 struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
 						   u64 bytenr, u32 blocksize);