s390-supplement-for-ptdesc-conversion-v2

fix build failure

Link: https://lkml.kernel.org/r/20240305072154.26168-1-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Janosch Frank <frankja@linux.ibm.com>
Cc: Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

arch/s390/mm/gmap.c

@@ -206,10 +206,10 @@ static void gmap_free(struct gmap *gmap)
 
 	/* Free additional data for a shadow gmap */
 	if (gmap_is_shadow(gmap)) {
-		struct ptdesc *ptdesc;
+		struct ptdesc *ptdesc, *n;
 
 		/* Free all page tables. */
-		list_for_each_entry_safe(ptdesc, next, &gmap->pt_list, pt_list)
+		list_for_each_entry_safe(ptdesc, n, &gmap->pt_list, pt_list)
 			page_table_free_pgste(ptdesc);
 		gmap_rmap_radix_tree_free(&gmap->host_to_rmap);
 		/* Release reference to the parent */