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/[email protected] Signed-off-by: ZhangPeng <[email protected]> Reviewed-by: Alexander Potapenko <[email protected]> Cc: Dmitry Vyukov <[email protected]> Cc: Kefeng Wang <[email protected]> Cc: Marco Elver <[email protected]> Cc: Nanyong Sun <[email protected]> Signed-off-by: Andrew Morton <[email protected]>
torvalds · Aug 21, 2023 · 4852a80 · 4852a80
1 parent 5d7800d
commit 4852a80
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diff --git a/mm/kmsan/hooks.c b/mm/kmsan/hooks.c
@@ -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;

diff --git a/mm/kmsan/shadow.c b/mm/kmsan/shadow.c
@@ -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;
 }