btrfs: use reada direction enum instead of constant value in populate_free_space_tree
authorGu Jinxiang <gujx@cn.fujitsu.com>
Thu, 11 Jan 2018 08:12:17 +0000 (16:12 +0800)
committerDavid Sterba <dsterba@suse.com>
Mon, 26 Mar 2018 13:09:37 +0000 (15:09 +0200)
commit019599ada73ce8ac0b0d60705819eba95df54630
tree77c7afe257c53adfdcd5a08f5db1ec00f4643638
parentc1c3fac2a95b14e36333528e408e76d90c93bbf7
btrfs: use reada direction enum instead of constant value in populate_free_space_tree

populate_free_space_tree calls function btrfs_search_slot_for_read with
parameter int find_higher = 1, it means that, if no exact match is
found, then use the next higher item.  So in function
populate_free_space_tree, use READA_FORWARD to read forward ahead.

This also changes the value from READA_BACK to READA_FORWARD, since
according to the logic, it should reada_for_search forward, not
backward.

Signed-off-by: Gu JinXiang <gujx@cn.fujitsu.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
fs/btrfs/free-space-tree.c