[XFS] Add lock annotations to xfs_trans_update_ail and

xfs_trans_delete_ail

xfs_trans_update_ail and xfs_trans_delete_ail get called with the AIL lock
held, and release it. Add lock annotations to these two functions so that
sparse can check callers for lock pairing, and so that sparse will not
complain about these functions since they intentionally use locks in this
manner.

SGI-PV: 954580
SGI-Modid: xfs-linux-melb:xfs-kern:26807a

Signed-off-by: Josh Triplett <josh@freedesktop.org>
Signed-off-by: Nathan Scott <nathans@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

fs/xfs/xfs_trans_ail.c

@@ -276,7 +276,7 @@ xfs_trans_update_ail(
 	xfs_mount_t	*mp,
 	xfs_log_item_t	*lip,
 	xfs_lsn_t	lsn,
-	unsigned long	s)
+	unsigned long	s) __releases(mp->m_ail_lock)
 {
 	xfs_ail_entry_t		*ailp;
 	xfs_log_item_t		*dlip=NULL;
@@ -328,7 +328,7 @@ void
 xfs_trans_delete_ail(
 	xfs_mount_t	*mp,
 	xfs_log_item_t	*lip,
-	unsigned long	s)
+	unsigned long	s) __releases(mp->m_ail_lock)
 {
 	xfs_ail_entry_t		*ailp;
 	xfs_log_item_t		*dlip;

fs/xfs/xfs_trans_priv.h

@@ -46,11 +46,13 @@ xfs_log_busy_slot_t		*xfs_trans_add_busy(xfs_trans_t *tp,
 /*
  * From xfs_trans_ail.c
  */
-void			xfs_trans_update_ail(struct xfs_mount *,
-				     struct xfs_log_item *, xfs_lsn_t,
-				     unsigned long);
-void			xfs_trans_delete_ail(struct xfs_mount *,
-				     struct xfs_log_item *, unsigned long);
+void			xfs_trans_update_ail(struct xfs_mount *mp,
+				     struct xfs_log_item *lip, xfs_lsn_t lsn,
+				     unsigned long s)
+				     __releases(mp->m_ail_lock);
+void			xfs_trans_delete_ail(struct xfs_mount *mp,
+				     struct xfs_log_item *lip, unsigned long s)
+				     __releases(mp->m_ail_lock);
 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 *);