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btrfs: use reada direction enum instead of constant value in populate_free_space_tree

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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>
This commit is contained in:
Gu Jinxiang 2018-01-11 16:12:17 +08:00 committed by David Sterba
parent c1c3fac2a9
commit 019599ada7
1 changed files with 1 additions and 1 deletions
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2
fs/btrfs/free-space-tree.c
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@ -1071,7 +1071,7 @@ static int populate_free_space_tree(struct btrfs_trans_handle *trans,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 1;
path->reada = READA_FORWARD;
path2 = btrfs_alloc_path();
if (!path2) {