[PATCH 1/6] btrfs: delayed-ref: pass delayed_refs directly to btrfs_select_ref_head()

[Lu Fengqi]

Since trans is only used for referring to delayed_refs, there is no need
to pass it instead of delayed_refs to btrfs_select_ref_head().

No functional change.

Signed-off-by: Lu Fengqi <lufq.f...@cn.fujitsu.com>
---
 fs/btrfs/delayed-ref.c | 5 +----
 fs/btrfs/delayed-ref.h | 2 +-
 fs/btrfs/extent-tree.c | 2 +-
 3 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index 7f567c944fec..13ae86252c4c 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -354,15 +354,12 @@ int btrfs_check_delayed_seq(struct btrfs_fs_info 
*fs_info, u64 seq)
 }
 
 struct btrfs_delayed_ref_head *
-btrfs_select_ref_head(struct btrfs_trans_handle *trans)
+btrfs_select_ref_head(struct btrfs_delayed_ref_root *delayed_refs)
 {
-       struct btrfs_delayed_ref_root *delayed_refs;
        struct btrfs_delayed_ref_head *head;
        u64 start;
        bool loop = false;
 
-       delayed_refs = &trans->transaction->delayed_refs;
-
 again:
        start = delayed_refs->run_delayed_start;
        head = find_ref_head(delayed_refs, start, 1);
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index c3e3486a126c..aa66ad6919ab 100644
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -264,7 +264,7 @@ static inline void btrfs_delayed_ref_unlock(struct 
btrfs_delayed_ref_head *head)
 
 
 struct btrfs_delayed_ref_head *
-btrfs_select_ref_head(struct btrfs_trans_handle *trans);
+btrfs_select_ref_head(struct btrfs_delayed_ref_root *delayed_refs);
 
 int btrfs_check_delayed_seq(struct btrfs_fs_info *fs_info, u64 seq);
 
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 22b9269ae84c..22acc1545147 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2511,7 +2511,7 @@ static struct btrfs_delayed_ref_head 
*btrfs_obtain_ref_head(
        int ret;
 
        spin_lock(&delayed_refs->lock);
-       head = btrfs_select_ref_head(trans);
+       head = btrfs_select_ref_head(delayed_refs);
        if (!head) {
                spin_unlock(&delayed_refs->lock);
                return head;
-- 
2.19.1