diff options
| author | Filipe Manana <fdmanana@gmail.com> | 2014-02-12 15:07:53 +0000 |
|---|---|---|
| committer | Josef Bacik <jbacik@fb.com> | 2014-03-10 15:16:46 -0400 |
| commit | 85fdfdf6118dc00c2fcea8907815e48c98ee6c1d (patch) | |
| tree | 7ad6d55dcded1a9d872f99f673c2f5ac326a5c2e /fs | |
| parent | 6103fb43fbc6d1caa78f26a1d0aa3d1a4525cea5 (diff) | |
Btrfs: cleanup delayed-ref.c:find_ref_head()
The argument last wasn't used, all callers supplied a NULL value
for it. Also removed unnecessary intermediate storage of the result
of key comparisons.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fb.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/delayed-ref.c | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index 56cdfe988d69..2502ba5a3ac0 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -199,42 +199,30 @@ static struct btrfs_delayed_ref_head *htree_insert(struct rb_root *root, */ static struct btrfs_delayed_ref_head * find_ref_head(struct rb_root *root, u64 bytenr, - struct btrfs_delayed_ref_head **last, int return_bigger) + int return_bigger) { struct rb_node *n; struct btrfs_delayed_ref_head *entry; - int cmp = 0; n = root->rb_node; entry = NULL; while (n) { entry = rb_entry(n, struct btrfs_delayed_ref_head, href_node); - if (last) - *last = entry; if (bytenr < entry->node.bytenr) - cmp = -1; - else if (bytenr > entry->node.bytenr) - cmp = 1; - else - cmp = 0; - - if (cmp < 0) n = n->rb_left; - else if (cmp > 0) + else if (bytenr > entry->node.bytenr) n = n->rb_right; else return entry; } if (entry && return_bigger) { - if (cmp > 0) { + if (bytenr > entry->node.bytenr) { n = rb_next(&entry->href_node); if (!n) n = rb_first(root); entry = rb_entry(n, struct btrfs_delayed_ref_head, href_node); - if (last) - *last = entry; return entry; } return entry; @@ -414,12 +402,12 @@ btrfs_select_ref_head(struct btrfs_trans_handle *trans) again: start = delayed_refs->run_delayed_start; - head = find_ref_head(&delayed_refs->href_root, start, NULL, 1); + head = find_ref_head(&delayed_refs->href_root, start, 1); if (!head && !loop) { delayed_refs->run_delayed_start = 0; start = 0; loop = true; - head = find_ref_head(&delayed_refs->href_root, start, NULL, 1); + head = find_ref_head(&delayed_refs->href_root, start, 1); if (!head) return NULL; } else if (!head && loop) { @@ -897,7 +885,7 @@ btrfs_find_delayed_ref_head(struct btrfs_trans_handle *trans, u64 bytenr) struct btrfs_delayed_ref_root *delayed_refs; delayed_refs = &trans->transaction->delayed_refs; - return find_ref_head(&delayed_refs->href_root, bytenr, NULL, 0); + return find_ref_head(&delayed_refs->href_root, bytenr, 0); } void btrfs_delayed_ref_exit(void) |