linux-master/mm/mm_init.c

852 		struct vmem_altmap *altmap, int migratetype)
869 		if (!altmap)
872 		if (start_pfn == altmap->base_pfn)
873 			start_pfn += altmap->reserve;
874 		end_pfn = altmap->base_pfn + vmem_altmap_offset(altmap);
1026  * of an altmap. See vmemmap_populate_compound_pages().
1028 static inline unsigned long compound_nr_pages(struct vmem_altmap *altmap,
1031 	if (!vmemmap_can_optimize(altmap, pgmap))
1071 	struct vmem_altmap *altmap = pgmap_altmap(pgmap);
1085 	if (altmap) {
1086 		start_pfn = altmap->base_pfn + vmem_altmap_offset(altmap);
1099 				     compound_nr_pages(altmap, pgmap));