mm: kmsan: use helper function page_size()

Patch series "minor cleanups for kmsan".

Use helper function and macros to improve code readability.  No functional
modification involved.


This patch (of 3):

Use function page_size() to improve code readability.  No functional
modification involved.

Link: https://lkml.kernel.org/r/20230727011612.2721843-1-zhangpeng362@huawei.com
Link: https://lkml.kernel.org/r/20230727011612.2721843-2-zhangpeng362@huawei.comSigned-off-by: ZhangPeng <zhangpeng362@huawei.com>
Reviewed-by: Alexander 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: Andrew Morton <akpm@linux-foundation.org>

mm/kmsan/hooks.c

@@ -117,7 +117,7 @@ void kmsan_kfree_large(const void *ptr)
 	page = virt_to_head_page((void *)ptr);
 	KMSAN_WARN_ON(ptr != page_address(page));
 	kmsan_internal_poison_memory((void *)ptr,
-				     PAGE_SIZE << compound_order(page),
+				     page_size(page),
 				     GFP_KERNEL,
 				     KMSAN_POISON_CHECK | KMSAN_POISON_FREE);
 	kmsan_leave_runtime();

mm/kmsan/shadow.c

@@ -210,7 +210,7 @@ void kmsan_free_page(struct page *page, unsigned int order)
 		return;
 	kmsan_enter_runtime();
 	kmsan_internal_poison_memory(page_address(page),
-				     PAGE_SIZE << compound_order(page),
+				     page_size(page),
 				     GFP_KERNEL,
 				     KMSAN_POISON_CHECK | KMSAN_POISON_FREE);
 	kmsan_leave_runtime();