[PATCH 1/5] mm: kmsan: export kmsan_copy_page_meta()

From: Alexander Potapenko <glider@google.com>
To: glider@google.com
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 1/5] mm: kmsan: export kmsan_copy_page_meta()
Date: Mon, 24 Oct 2022 23:21:40 +0200	[thread overview]
Message-ID: <20221024212144.2852069-1-glider@google.com> (raw)

Certain modules call copy_user_highpage(), which calls
kmsan_copy_page_meta() under KMSAN, so we need to export the latter.

Cc: Andrew Morton <akpm@linux-foundation.org>
Fixes: b073d7f8aee4 ("mm: kmsan: maintain KMSAN metadata for page operations")
Link: https://github.com/google/kmsan/issues/89
Signed-off-by: Alexander Potapenko <glider@google.com>
---
 mm/kmsan/shadow.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/kmsan/shadow.c b/mm/kmsan/shadow.c
index 21e3e196ec3cf..a787c04e9583c 100644
--- 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)
 {
-- 
2.38.0.135.g90850a2211-goog

