[PATCH 05/10] repair: use a listhead for the dotdot list

[Dave Chinner <david@xxxxxxxxxxxxx>]

From: Dave Chinner <dchinner@xxxxxxxxxx>

Cleanup suggested by Christoph Hellwig - removes another open coded
list implementation.

Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
 repair/phase6.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/repair/phase6.c b/repair/phase6.c
index cdbf4db..7be68b3 100644
--- a/repair/phase6.c
+++ b/repair/phase6.c
@@ -43,13 +43,13 @@ static struct xfs_name              xfs_name_dot = 
{(unsigned char *)".",
  * entries are updated. These must be rebuilt after the initial pass
  */
 typedef struct dotdot_update {
-       struct dotdot_update    *next;
+       struct list_head        list;
        ino_tree_node_t         *irec;
        xfs_agnumber_t          agno;
        int                     ino_offset;
 } dotdot_update_t;
 
-static dotdot_update_t         *dotdot_update_list;
+static LIST_HEAD(dotdot_update_list);
 static int                     dotdot_update;
 
 static void
@@ -64,12 +64,12 @@ add_dotdot_update(
                do_error(_("malloc failed add_dotdot_update (%zu bytes)\n"),
                        sizeof(dotdot_update_t));
 
-       dir->next = dotdot_update_list;
+       INIT_LIST_HEAD(&dir->list);
        dir->irec = irec;
        dir->agno = agno;
        dir->ino_offset = ino_offset;
 
-       dotdot_update_list = dir;
+       list_add(&dir->list, &dotdot_update_list);
 }
 
 /*
@@ -3021,9 +3021,10 @@ update_missing_dotdot_entries(
         * set dotdot_update flag so processing routines do not count links
         */
        dotdot_update = 1;
-       while (dotdot_update_list) {
-               dir = dotdot_update_list;
-               dotdot_update_list = dir->next;
+       while (!list_empty(&dotdot_update_list)) {
+               dir = list_entry(dotdot_update_list.prev, struct dotdot_update,
+                                list);
+               list_del(&dir->list);
                process_dir_inode(mp, dir->agno, dir->irec, dir->ino_offset);
                free(dir);
        }
-- 
1.8.4.rc3