[XFS] Allocate the struct xfs_ail

Rather than embedding the struct xfs_ail in the struct xfs_mount, allocate
it during AIL initialisation. Add a back pointer to the struct xfs_ail so
that we can pass around the xfs_ail and still be able to access the
xfs_mount if need be. This is th first step involved in isolating the AIL
implementation from the surrounding filesystem code.

SGI-PV: 988143

SGI-Modid: xfs-linux-melb:xfs-kern:32346a

Signed-off-by: David Chinner <david@fromorbit.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Christoph Hellwig <hch@infradead.org>

1 files changed, 12 insertions, 5 deletions

diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index 3c748c456ed4..98317fdc33b5 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -56,13 +56,20 @@ struct xfs_log_item	*xfs_trans_first_ail(struct xfs_mount *, int *);
 struct xfs_log_item     *xfs_trans_next_ail(struct xfs_mount *,
                                      struct xfs_log_item *, int *, int *);
 
-
 /*
  * AIL push thread support
  */
-long    xfsaild_push(struct xfs_mount *, xfs_lsn_t *);
-void    xfsaild_wakeup(struct xfs_mount *, xfs_lsn_t);
-int     xfsaild_start(struct xfs_mount *);
-void    xfsaild_stop(struct xfs_mount *);
+struct xfs_ail {
+        struct xfs_mount        *xa_mount;
+        struct list_head        xa_ail;
+        uint                    xa_gen;
+        struct task_struct      *xa_task;
+        xfs_lsn_t               xa_target;
+};
+
+long    xfsaild_push(struct xfs_ail *, xfs_lsn_t *);
+void    xfsaild_wakeup(struct xfs_ail *, xfs_lsn_t);
+int     xfsaild_start(struct xfs_ail *);
+void    xfsaild_stop(struct xfs_ail *);
 
 #endif  /* __XFS_TRANS_PRIV_H__ */