[PATCH 5/7] btrfs-progs: backref: add list_first_pref helper

[jeffm]

From: Jeff Mahoney <je...@suse.com>

---
 backref.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/backref.c b/backref.c
index ac1b506..be3376a 100644
--- a/backref.c
+++ b/backref.c
@@ -130,6 +130,11 @@ struct __prelim_ref {
        u64 wanted_disk_byte;
 };
 
+static struct __prelim_ref *list_first_pref(struct list_head *head)
+{
+       return list_first_entry(head, struct __prelim_ref, list);
+}
+
 struct pref_state {
        struct list_head pending;
 };
@@ -804,8 +809,7 @@ static int find_parent_nodes(struct btrfs_trans_handle 
*trans,
        __merge_refs(&prefstate, 2);
 
        while (!list_empty(&prefstate.pending)) {
-               ref = list_first_entry(&prefstate.pending,
-                                      struct __prelim_ref, list);
+               ref = list_first_pref(&prefstate.pending);
                WARN_ON(ref->count < 0);
                if (roots && ref->count && ref->root_id && ref->parent == 0) {
                        /* no parent == root of tree */
@@ -857,8 +861,7 @@ static int find_parent_nodes(struct btrfs_trans_handle 
*trans,
 out:
        btrfs_free_path(path);
        while (!list_empty(&prefstate.pending)) {
-               ref = list_first_entry(&prefstate.pending,
-                                      struct __prelim_ref, list);
+               ref = list_first_pref(&prefstate.pending);
                list_del(&ref->list);
                kfree(ref);
        }
-- 
2.11.0

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