mm: kmsan: export kmsan_copy_page_meta()

ramosian-glider · akpm00 · commit f59a3ee69129 · 2022-10-28T13:37:22.000-07:00
Certain modules call copy_user_highpage(), which calls kmsan_copy_page_meta() under KMSAN, so we need to export the latter. Link: https://lkml.kernel.org/r/20221024212144.2852069-1-glider@google.com Link: google/kmsan#89 Fixes: b073d7f ("mm: kmsan: maintain KMSAN metadata for page operations") Signed-off-by: Alexander Potapenko <glider@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
diff --git a/mm/kmsan/shadow.c b/mm/kmsan/shadow.c
@@ -167,6 +167,7 @@ void kmsan_copy_page_meta(struct page *dst, struct page *src)
 	__memcpy(origin_ptr_for(dst), origin_ptr_for(src), PAGE_SIZE);
 	kmsan_leave_runtime();
 }
+EXPORT_SYMBOL(kmsan_copy_page_meta);
 
 void kmsan_alloc_page(struct page *page, unsigned int order, gfp_t flags)
 {

Original file line number	Diff line number	Diff line change
`@@ -167,6 +167,7 @@ void kmsan_copy_page_meta(struct page dst, struct page src)`
`167`	`167`	`__memcpy(origin_ptr_for(dst), origin_ptr_for(src), PAGE_SIZE);`
`168`	`168`	`kmsan_leave_runtime();`
`169`	`169`	`}`
	`170`	`+EXPORT_SYMBOL(kmsan_copy_page_meta);`
`170`	`171`
`171`	`172`	`void kmsan_alloc_page(struct page *page, unsigned int order, gfp_t flags)`
`172`	`173`	`{`