xfs: kill ialloced in xfs_dialloc()

It's enough to just use return code, and get rid of an argument.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Gao Xiang <hsiangkao@redhat.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/libxfs/xfs_ialloc.c

@@ -607,13 +607,13 @@ xfs_inobt_insert_sprec(
 
 /*
  * Allocate new inodes in the allocation group specified by agbp.
- * Return 0 for success, else error code.
+ * Returns 0 if inodes were allocated in this AG; 1 if there was no space
+ * in this AG; or the usual negative error code.
  */
 STATIC int
 xfs_ialloc_ag_alloc(
 	struct xfs_trans	*tp,
-	struct xfs_buf		*agbp,
-	int			*alloc)
+	struct xfs_buf		*agbp)
 {
 	struct xfs_agi		*agi;
 	struct xfs_alloc_arg	args;
@@ -795,10 +795,9 @@ xfs_ialloc_ag_alloc(
 		allocmask = (1 << (newlen / XFS_INODES_PER_HOLEMASK_BIT)) - 1;
 	}
 
-	if (args.fsbno == NULLFSBLOCK) {
-		*alloc = 0;
-		return 0;
-	}
+	if (args.fsbno == NULLFSBLOCK)
+		return 1;
+
 	ASSERT(args.len == args.minlen);
 
 	/*
@@ -903,7 +902,6 @@ xfs_ialloc_ag_alloc(
 	 */
 	xfs_trans_mod_sb(tp, XFS_TRANS_SB_ICOUNT, (long)newlen);
 	xfs_trans_mod_sb(tp, XFS_TRANS_SB_IFREE, (long)newlen);
-	*alloc = 1;
 	return 0;
 }
 
@@ -1739,7 +1737,6 @@ xfs_dialloc_select_ag(
 	struct xfs_buf		*agbp;
 	xfs_agnumber_t		agno;
 	int			error;
-	int			ialloced;
 	bool			noroom = false;
 	xfs_agnumber_t		start_agno;
 	struct xfs_perag	*pag;
@@ -1812,9 +1809,8 @@ xfs_dialloc_select_ag(
 		if (!okalloc)
 			goto nextag_relse_buffer;
 
-
-		error = xfs_ialloc_ag_alloc(*tpp, agbp, &ialloced);
-		if (error) {
+		error = xfs_ialloc_ag_alloc(*tpp, agbp);
+		if (error < 0) {
 			xfs_trans_brelse(*tpp, agbp);
 
 			if (error == -ENOSPC)
@@ -1822,7 +1818,7 @@ xfs_dialloc_select_ag(
 			break;
 		}
 
-		if (ialloced) {
+		if (error == 0) {
 			/*
 			 * We successfully allocated space for an inode cluster
 			 * in this AG.  Roll the transaction so that we can