linux-kernel - Re: [RESEND PATCH v1 1/5] mm: vmalloc must set pte via arch code

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Message-ID: <F6BE4C55-EDF2-47DB-A1D3-F4DEA93E89D4@nvidia.com>
Date:   Thu, 11 May 2023 11:00:37 -0400
From:   Zi Yan <ziy@...dia.com>
To:     Ryan Roberts <ryan.roberts@....com>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        SeongJae Park <sj@...nel.org>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, damon@...ts.linux.dev
Subject: Re: [RESEND PATCH v1 1/5] mm: vmalloc must set pte via arch code

On 11 May 2023, at 9:21, Ryan Roberts wrote:

> It is bad practice to directly set pte entries within a pte table.
> Instead all modifications must go through arch-provided helpers such as
> set_pte_at() to give the arch code visibility and allow it to validate
> (and potentially modify) the operation.
>
> Fixes: 3e9a9e256b1e ("mm: add a vmap_pfn function")
> Signed-off-by: Ryan Roberts <ryan.roberts@....com>
> ---
>  mm/vmalloc.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
LGTM. Reviewed-by: Zi Yan <ziy@...dia.com>


--
Best Regards,
Yan, Zi

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