xfs: convert xfs_log_commit_cil() to void

Convert xfs_log_commit_cil() to a void function since it return nothing
but 0 in any case, after that we can simplify the relative code logic
in xfs_trans_commit() accordingly.
Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

fs/xfs/xfs_log.h

@@ -175,7 +175,7 @@ void	  xlog_iodone(struct xfs_buf *);
 struct xlog_ticket *xfs_log_ticket_get(struct xlog_ticket *ticket);
 void	  xfs_log_ticket_put(struct xlog_ticket *ticket);
 
-int	xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
+void	xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
 				xfs_lsn_t *commit_lsn, int flags);
 bool	xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
 

fs/xfs/xfs_log_cil.c

@@ -710,7 +710,7 @@ xlog_cil_empty(
  * background commit, returns without it held once background commits are
  * allowed again.
  */
-int
+void
 xfs_log_commit_cil(
 	struct xfs_mount	*mp,
 	struct xfs_trans	*tp,
@@ -756,7 +756,6 @@ xfs_log_commit_cil(
 	xlog_cil_push_background(log);
 
 	up_read(&cil->xc_ctx_lock);
-	return 0;
 }
 
 /*

fs/xfs/xfs_trans.c

@@ -887,12 +887,7 @@ xfs_trans_commit(
 		xfs_trans_apply_sb_deltas(tp);
 	xfs_trans_apply_dquot_deltas(tp);
 
-	error = xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
-	if (error == ENOMEM) {
-		xfs_force_shutdown(mp, SHUTDOWN_LOG_IO_ERROR);
-		error = XFS_ERROR(EIO);
-		goto out_unreserve;
-	}
+	xfs_log_commit_cil(mp, tp, &commit_lsn, flags);
 
 	current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS);
 	xfs_trans_free(tp);
@@ -902,10 +897,7 @@ xfs_trans_commit(
 	 * log out now and wait for it.
 	 */
 	if (sync) {
-		if (!error) {
-			error = _xfs_log_force_lsn(mp, commit_lsn,
-				      XFS_LOG_SYNC, NULL);
-		}
+		error = _xfs_log_force_lsn(mp, commit_lsn, XFS_LOG_SYNC, NULL);
 		XFS_STATS_INC(xs_trans_sync);
 	} else {
 		XFS_STATS_INC(xs_trans_async);