Commit 53456b7b authored by Kefeng Wang's avatar Kefeng Wang Committed by Andrew Morton
Browse files

mm: migrate_device: use a folio in migrate_device_range() 

Save two calls to compound_head() and use folio throughout.

Link: https://lkml.kernel.org/r/20240826065814.1336616-3-wangkefeng.wang@huawei.com


Signed-off-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Acked-by: default avatarDavid Hildenbrand <david@redhat.com>
Reviewed-by: default avatarVishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: default avatarAlistair Popple <apopple@nvidia.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 5c8525a3

mm/migrate_device.c

+5 −4
Original line number Diff line number Diff line
@@ -898,16 +898,17 @@ int migrate_device_range(unsigned long *src_pfns, unsigned long start, 
	unsigned long i, pfn;



	for (pfn = start, i = 0; i < npages; pfn++, i++) {

		struct page *page = pfn_to_page(pfn);

		struct folio *folio;



		if (!get_page_unless_zero(page)) {

		folio = folio_get_nontail_page(pfn_to_page(pfn));

		if (!folio) {

			src_pfns[i] = 0;

			continue;

		}



		if (!trylock_page(page)) {

		if (!folio_trylock(folio)) {

			src_pfns[i] = 0;

			put_page(page);

			folio_put(folio);

			continue;

		}