Messages in this thread | | | Date | Thu, 12 Nov 2020 09:31:31 +0000 | From | Catalin Marinas <> | Subject | Re: [PATCH v9 28/44] arm64: mte: Reset the page tag in page->flags |
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On Tue, Nov 10, 2020 at 11:10:25PM +0100, Andrey Konovalov wrote: > diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c > index 70a71f38b6a9..f0efa4847e2f 100644 > --- a/arch/arm64/mm/copypage.c > +++ b/arch/arm64/mm/copypage.c > @@ -23,6 +23,7 @@ void copy_highpage(struct page *to, struct page *from) > > if (system_supports_mte() && test_bit(PG_mte_tagged, &from->flags)) { > set_bit(PG_mte_tagged, &to->flags); > + page_kasan_tag_reset(to); > mte_copy_page_tags(kto, kfrom);
Any reason why this doesn't have an smp_wmb() between resetting the tags and copying them into kto?
-- Catalin
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