[XFS] Replace custom AIL linked-list code with struct list_head

Replace the xfs_ail_entry_t with a struct list_head and clean the
surrounding code up. Also fixes a livelock in xfs_trans_first_push_ail()
by terminating the loop at the head of the list correctly.

SGI-PV: 978682
SGI-Modid: xfs-linux-melb:xfs-kern:30636a

Signed-off-by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>

1 files changed, 1 insertions, 6 deletions

diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index b5effce00089..0804207c7391 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -113,13 +113,8 @@ struct xfs_mount;
 struct xfs_trans;
 struct xfs_dquot_acct;
 
-typedef struct xfs_ail_entry {
-        struct xfs_log_item     *ail_forw;      /* AIL forw pointer */
-        struct xfs_log_item     *ail_back;      /* AIL back pointer */
-} xfs_ail_entry_t;
-
 typedef struct xfs_log_item {
-        xfs_ail_entry_t                 li_ail;         /* AIL pointers */
+        struct list_head                li_ail;         /* AIL pointers */
         xfs_lsn_t                       li_lsn;         /* last on-disk lsn */
         struct xfs_log_item_desc        *li_desc;       /* ptr to current desc*/
         struct xfs_mount                *li_mountp;     /* ptr to fs mount */