[PATCH 2/6] btrfs: delayed-ref: pass delayed_refs directly to btrfs_delayed_ref_lock()

[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_delayed_ref_lock().

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 13ae86252c4c..885581852bea 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -204,12 +204,9 @@ static struct btrfs_delayed_ref_head* find_ref_head(
        return NULL;
 }
 
-int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans,
+int btrfs_delayed_ref_lock(struct btrfs_delayed_ref_root *delayed_refs,
                           struct btrfs_delayed_ref_head *head)
 {
-       struct btrfs_delayed_ref_root *delayed_refs;
-
-       delayed_refs = &trans->transaction->delayed_refs;
        lockdep_assert_held(&delayed_refs->lock);
        if (mutex_trylock(&head->mutex))
                return 0;
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index aa66ad6919ab..ef6f5cf75b3e 100644
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -255,7 +255,7 @@ void btrfs_merge_delayed_refs(struct btrfs_trans_handle 
*trans,
 struct btrfs_delayed_ref_head *
 btrfs_find_delayed_ref_head(struct btrfs_delayed_ref_root *delayed_refs,
                            u64 bytenr);
-int btrfs_delayed_ref_lock(struct btrfs_trans_handle *trans,
+int btrfs_delayed_ref_lock(struct btrfs_delayed_ref_root *delayed_refs,
                           struct btrfs_delayed_ref_head *head);
 static inline void btrfs_delayed_ref_unlock(struct btrfs_delayed_ref_head 
*head)
 {
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 22acc1545147..77156bd2a9a7 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2521,7 +2521,7 @@ static struct btrfs_delayed_ref_head 
*btrfs_obtain_ref_head(
         * Grab the lock that says we are going to process all the refs for
         * this head
         */
-       ret = btrfs_delayed_ref_lock(trans, head);
+       ret = btrfs_delayed_ref_lock(delayed_refs, head);
        spin_unlock(&delayed_refs->lock);
 
        /*
-- 
2.19.1