Re: [PATCH 2/3] mm: introduce clear_highpage_tagged

[Andrew Morton]

On Tue, 31 May 2022 17:43:49 +0200 andrey.konovalov@xxxxxxxxx wrote:

> From: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
> 
> Add a clear_highpage_tagged() helper that does clear_highpage() on a
> page potentially tagged by KASAN.

clear_highpage_kasan_tagged() would be a better name, no?

--- a/include/linux/highmem.h~mm-introduce-clear_highpage_tagged-fix
+++ a/include/linux/highmem.h
@@ -243,7 +243,7 @@ static inline void clear_highpage(struct
 	kunmap_local(kaddr);
 }
 
-static inline void clear_highpage_tagged(struct page *page)
+static inline void clear_highpage_kasan_tagged(struct page *page)
 {
 	u8 tag;
 
--- a/mm/page_alloc.c~mm-introduce-clear_highpage_tagged-fix
+++ a/mm/page_alloc.c
@@ -1311,7 +1311,7 @@ static void kernel_init_pages(struct pag
 	/* s390's use of memset() could override KASAN redzones. */
 	kasan_disable_current();
 	for (i = 0; i < numpages; i++)
-		clear_highpage_tagged(page + i);
+		clear_highpage_kasan_tagged(page + i);
 	kasan_enable_current();
 }
 
_