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

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Message-ID: <ZGRyF1nL20wUK2et@infradead.org>
Date:   Tue, 16 May 2023 23:20:07 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Lorenzo Stoakes <lstoakes@...il.com>
Cc:     Ryan Roberts <ryan.roberts@....com>,
        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,
        Christoph Hellwig <hch@...radead.org>,
        Uladzislau Rezki <urezki@...il.com>
Subject: Re: [RESEND PATCH v1 1/5] mm: vmalloc must set pte via arch code

On Sat, May 13, 2023 at 02:14:18PM +0100, Lorenzo Stoakes wrote:
> > Fixes: 3e9a9e256b1e ("mm: add a vmap_pfn function")
> 
> Not sure if this is really 'fixing' anything, I mean ostensibly, but not
> sure if the tag is relevant here, that is more so for a bug being
> introduced, and unless an issue has arisen not sure if it's
> appropriate. But this might be a nit, again!

vmap_pfn was factored out of i915-specific code, which probably never
ran on anything but x86 at that time.  Now that intel builds plug in
GPUs is probably could.  But independent of that core mm code should use
the proper APIs.