145  * This function creates new shadow/origin pages for the physical pages mapped
146  * into the virtual memory. If those physical pages already had shadow/origin,
154 	struct page *shadow, *origin;  in kmsan_ioremap_page_range()  local
165 		origin = alloc_pages(gfp_mask, 1);  in kmsan_ioremap_page_range()
166 		if (!shadow || !origin) {  in kmsan_ioremap_page_range()
181 			vmalloc_origin(start + off + PAGE_SIZE), prot, &origin,  in kmsan_ioremap_page_range()
190 		origin = NULL;  in kmsan_ioremap_page_range()
198 		 * Something went wrong. Clean up shadow/origin pages allocated  in kmsan_ioremap_page_range()
204 		if (origin)  in kmsan_ioremap_page_range()
205 			__free_pages(origin, 1);  in kmsan_ioremap_page_range()
222 	struct page *shadow, *origin;  in kmsan_iounmap_page_range()  local
235 		origin = kmsan_vmalloc_to_page_or_null((void *)v_origin);  in kmsan_iounmap_page_range()
240 		if (origin)  in kmsan_iounmap_page_range()
241 			__free_pages(origin, 1);  in kmsan_iounmap_page_range()
376  * To create an origin, kmsan_poison_memory() unwinds the stacks and stores it