Commit 4852a805 authored by ZhangPeng's avatar ZhangPeng Committed by Andrew Morton
Browse files

mm: kmsan: use helper macro offset_in_page() 

Use helper macro offset_in_page() to improve code readability.  No
functional modification involved.

Link: https://lkml.kernel.org/r/20230727011612.2721843-3-zhangpeng362@huawei.com


Signed-off-by: default avatarZhangPeng <zhangpeng362@huawei.com>
Reviewed-by: default avatarAlexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: Marco Elver <elver@google.com>
Cc: Nanyong Sun <sunnanyong@huawei.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 5d7800d9

mm/kmsan/hooks.c

+1 −1
Original line number Diff line number Diff line
@@ -339,7 +339,7 @@ void kmsan_handle_dma(struct page *page, size_t offset, size_t size, 
	 * internal KMSAN checks.

	 */

	while (size > 0) {

		page_offset = addr % PAGE_SIZE;

		page_offset = offset_in_page(addr);

		to_go = min(PAGE_SIZE - page_offset, (u64)size);

		kmsan_handle_dma_page((void *)addr, to_go, dir);

		addr += to_go;

mm/kmsan/shadow.c

+1 −1
Original line number Diff line number Diff line
@@ -145,7 +145,7 @@ void *kmsan_get_metadata(void *address, bool is_origin) 
		return NULL;

	if (!page_has_metadata(page))

		return NULL;

	off = addr % PAGE_SIZE;

	off = offset_in_page(addr);



	return (is_origin ? origin_ptr_for(page) : shadow_ptr_for(page)) + off;

}