2139 	struct migrate_vma *migrate = walk->private;  in migrate_vma_collect_hole()  local
2143 		migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE;  in migrate_vma_collect_hole()
2144 		migrate->dst[migrate->npages] = 0;  in migrate_vma_collect_hole()
2145 		migrate->npages++;  in migrate_vma_collect_hole()
2146 		migrate->cpages++;  in migrate_vma_collect_hole()
2156 	struct migrate_vma *migrate = walk->private;  in migrate_vma_collect_skip()  local
2160 		migrate->dst[migrate->npages] = 0;  in migrate_vma_collect_skip()
2161 		migrate->src[migrate->npages++] = 0;  in migrate_vma_collect_skip()
2172 	struct migrate_vma *migrate = walk->private;  in migrate_vma_collect_pmd()  local
2235 			migrate->cpages++;  in migrate_vma_collect_pmd()
2260 				migrate->cpages++;  in migrate_vma_collect_pmd()
2263 			page = vm_normal_page(migrate->vma, addr, pte);  in migrate_vma_collect_pmd()
2284 		migrate->cpages++;  in migrate_vma_collect_pmd()
2318 		migrate->dst[migrate->npages] = 0;  in migrate_vma_collect_pmd()
2319 		migrate->src[migrate->npages++] = mpfn;  in migrate_vma_collect_pmd()
2344 static void migrate_vma_collect(struct migrate_vma *migrate)  in migrate_vma_collect()  argument
2349 			migrate->vma->vm_mm, migrate->start, migrate->end);  in migrate_vma_collect()
2352 	walk_page_range(migrate->vma->vm_mm, migrate->start, migrate->end,  in migrate_vma_collect()
2353 			&migrate_vma_walk_ops, migrate);  in migrate_vma_collect()
2356 	migrate->end = migrate->start + (migrate->npages << PAGE_SHIFT);  in migrate_vma_collect()
2421 static void migrate_vma_prepare(struct migrate_vma *migrate)  in migrate_vma_prepare()  argument
2423 	const unsigned long npages = migrate->npages;  in migrate_vma_prepare()
2424 	const unsigned long start = migrate->start;  in migrate_vma_prepare()
2430 	for (i = 0; (i < npages) && migrate->cpages; i++) {  in migrate_vma_prepare()
2431 		struct page *page = migrate_pfn_to_page(migrate->src[i]);  in migrate_vma_prepare()
2437 		if (!(migrate->src[i] & MIGRATE_PFN_LOCKED)) {  in migrate_vma_prepare()
2447 				migrate->src[i] = 0;  in migrate_vma_prepare()
2448 				migrate->cpages--;  in migrate_vma_prepare()
2453 			migrate->src[i] |= MIGRATE_PFN_LOCKED;  in migrate_vma_prepare()
2466 					migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_prepare()
2467 					migrate->cpages--;  in migrate_vma_prepare()
2470 					migrate->src[i] = 0;  in migrate_vma_prepare()
2472 					migrate->cpages--;  in migrate_vma_prepare()
2484 				migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_prepare()
2485 				migrate->cpages--;  in migrate_vma_prepare()
2493 				migrate->src[i] = 0;  in migrate_vma_prepare()
2495 				migrate->cpages--;  in migrate_vma_prepare()
2506 		struct page *page = migrate_pfn_to_page(migrate->src[i]);  in migrate_vma_prepare()
2508 		if (!page || (migrate->src[i] & MIGRATE_PFN_MIGRATE))  in migrate_vma_prepare()
2511 		remove_migration_pte(page, migrate->vma, addr, page);  in migrate_vma_prepare()
2513 		migrate->src[i] = 0;  in migrate_vma_prepare()
2531 static void migrate_vma_unmap(struct migrate_vma *migrate)  in migrate_vma_unmap()  argument
2534 	const unsigned long npages = migrate->npages;  in migrate_vma_unmap()
2535 	const unsigned long start = migrate->start;  in migrate_vma_unmap()
2539 		struct page *page = migrate_pfn_to_page(migrate->src[i]);  in migrate_vma_unmap()
2541 		if (!page || !(migrate->src[i] & MIGRATE_PFN_MIGRATE))  in migrate_vma_unmap()
2554 		migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_unmap()
2555 		migrate->cpages--;  in migrate_vma_unmap()
2560 		struct page *page = migrate_pfn_to_page(migrate->src[i]);  in migrate_vma_unmap()
2562 		if (!page || (migrate->src[i] & MIGRATE_PFN_MIGRATE))  in migrate_vma_unmap()
2567 		migrate->src[i] = 0;  in migrate_vma_unmap()
2682 static void migrate_vma_insert_page(struct migrate_vma *migrate,  in migrate_vma_insert_page()  argument
2688 	struct vm_area_struct *vma = migrate->vma;  in migrate_vma_insert_page()
2821 void migrate_vma_pages(struct migrate_vma *migrate)  in migrate_vma_pages()  argument
2823 	const unsigned long npages = migrate->npages;  in migrate_vma_pages()
2824 	const unsigned long start = migrate->start;  in migrate_vma_pages()
2830 		struct page *newpage = migrate_pfn_to_page(migrate->dst[i]);  in migrate_vma_pages()
2831 		struct page *page = migrate_pfn_to_page(migrate->src[i]);  in migrate_vma_pages()
2836 			migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_pages()
2841 			if (!(migrate->src[i] & MIGRATE_PFN_MIGRATE)) {  in migrate_vma_pages()
2850 							migrate->vma->vm_mm,  in migrate_vma_pages()
2851 							addr, migrate->end);  in migrate_vma_pages()
2854 			migrate_vma_insert_page(migrate, addr, newpage,  in migrate_vma_pages()
2855 						&migrate->src[i],  in migrate_vma_pages()
2856 						&migrate->dst[i]);  in migrate_vma_pages()
2869 					migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_pages()
2877 				migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_pages()
2884 			migrate->src[i] &= ~MIGRATE_PFN_MIGRATE;  in migrate_vma_pages()
2908 void migrate_vma_finalize(struct migrate_vma *migrate)  in migrate_vma_finalize()  argument
2910 	const unsigned long npages = migrate->npages;  in migrate_vma_finalize()
2914 		struct page *newpage = migrate_pfn_to_page(migrate->dst[i]);  in migrate_vma_finalize()
2915 		struct page *page = migrate_pfn_to_page(migrate->src[i]);  in migrate_vma_finalize()
2925 		if (!(migrate->src[i] & MIGRATE_PFN_MIGRATE) || !newpage) {  in migrate_vma_finalize()
2935 		migrate->cpages--;  in migrate_vma_finalize()