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mm: kmsan: export kmsan_copy_page_meta() 

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: https://github.com/google/kmsan/issues/89
Fixes: b073d7f8ae ("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>
This commit is contained in:
Alexander Potapenko 2022-10-24 23:21:40 +02:00 committed by Andrew Morton
parent 03e5f82ea6
commit f59a3ee691
1 changed files with 1 additions and 0 deletions
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mm/kmsan/shadow.c
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@ -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); __memcpy(origin_ptr_for(dst), origin_ptr_for(src), PAGE_SIZE);
kmsan_leave_runtime(); kmsan_leave_runtime();
} }
EXPORT_SYMBOL(kmsan_copy_page_meta);
void kmsan_alloc_page(struct page *page, unsigned int order, gfp_t flags) void kmsan_alloc_page(struct page *page, unsigned int order, gfp_t flags)
{ {