maple_tree: replace mas_logical_pivot() with mas_safe_pivot()

Replace mas_logical_pivot() with mas_safe_pivot() and drop
mas_logical_pivot() since it won't be used anymore.  We can do this since
now all nodes will have node limit pivot (if it is not full node).

Link: https://lkml.kernel.org/r/20230711035444.526-8-zhangpeng.00@bytedance.com
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

lib/maple_tree.c

@@ -728,33 +728,6 @@ mas_safe_min(struct ma_state *mas, unsigned long *pivots, unsigned char offset)
 	return mas->min;
 }
 
-/*
- * mas_logical_pivot() - Get the logical pivot of a given offset.
- * @mas: The maple state
- * @pivots: The pointer to the maple node pivots
- * @offset: The offset into the pivot array
- * @type: The maple node type
- *
- * When there is no value at a pivot (beyond the end of the data), then the
- * pivot is actually @mas->max.
- *
- * Return: the logical pivot of a given @offset.
- */
-static inline unsigned long
-mas_logical_pivot(struct ma_state *mas, unsigned long *pivots,
-		  unsigned char offset, enum maple_type type)
-{
-	unsigned long lpiv = mas_safe_pivot(mas, pivots, offset, type);
-
-	if (likely(lpiv))
-		return lpiv;
-
-	if (likely(offset))
-		return mas->max;
-
-	return lpiv;
-}
-
 /*
  * mte_set_pivot() - Set a pivot to a value in an encoded maple node.
  * @mn: The encoded maple node
@@ -2202,7 +2175,7 @@ static noinline_for_kasan void mas_store_b_node(struct ma_wr_state *wr_mas,
 		goto b_end;
 
 	/* Handle new range ending before old range ends */
-	piv = mas_logical_pivot(mas, wr_mas->pivots, offset_end, wr_mas->type);
+	piv = mas_safe_pivot(mas, wr_mas->pivots, offset_end, wr_mas->type);
 	if (piv > mas->last) {
 		if (piv == ULONG_MAX)
 			mas_bulk_rebalance(mas, b_node->b_end, wr_mas->type);
@@ -4935,7 +4908,7 @@ static inline bool mas_anode_descend(struct ma_state *mas, unsigned long size)
 	min = mas_safe_min(mas, pivots, offset);
 	data_end = ma_data_end(node, type, pivots, mas->max);
 	for (; offset <= data_end; offset++) {
-		pivot = mas_logical_pivot(mas, pivots, offset, type);
+		pivot = mas_safe_pivot(mas, pivots, offset, type);
 
 		/* Not within lower bounds */
 		if (mas->index > pivot)
@@ -6981,7 +6954,7 @@ static void mas_validate_gaps(struct ma_state *mas)
 
 	gaps = ma_gaps(node, mt);
 	for (i = 0; i < mt_slot_count(mte); i++) {
-		p_end = mas_logical_pivot(mas, pivots, i, mt);
+		p_end = mas_safe_pivot(mas, pivots, i, mt);
 
 		if (!gaps) {
 			if (!mas_get_slot(mas, i))