linux-kernel - Re: [PATCH 1/2] mm: call flush_dcache_page in memcpy_to_page and memzero

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Message-Id: <20210713183123.699769a1b0ee95d69606c35d@linux-foundation.org>
Date:   Tue, 13 Jul 2021 18:31:23 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Ira Weiny <ira.weiny@...el.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH 1/2] mm: call flush_dcache_page in memcpy_to_page and
 memzero_page

On Tue, 13 Jul 2021 07:52:30 +0200 Christoph Hellwig <hch@....de> wrote:

> memcpy_to_page and memzero_page can write to arbitrary pages, which could
> be in the page cache or in high memory, so  call flush_kernel_dcache_pages
> to flush the dcache.

I assume this presently is not known to cause any problems, but that
some problems might be discovered in the future?  In which case,
should we cc:stable?