linux-kernel - Re: [PATCH v1 4/4] mm: remove boolean output parameters from folio_pte_batch

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Message-ID: <428257a9-439f-43a5-8590-4de83d45e185@lucifer.local>
Date: Mon, 30 Jun 2025 12:18:55 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: David Hildenbrand <david@...hat.com>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Vlastimil Babka <vbabka@...e.cz>, Jann Horn <jannh@...gle.com>,
        Mike Rapoport <rppt@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
        Zi Yan <ziy@...dia.com>, Matthew Brost <matthew.brost@...el.com>,
        Joshua Hahn <joshua.hahnjy@...il.com>, Rakie Kim <rakie.kim@...com>,
        Byungchul Park <byungchul@...com>, Gregory Price <gourry@...rry.net>,
        Ying Huang <ying.huang@...ux.alibaba.com>,
        Alistair Popple <apopple@...dia.com>, Pedro Falcato <pfalcato@...e.de>,
        Rik van Riel <riel@...riel.com>, Harry Yoo <harry.yoo@...cle.com>
Subject: Re: [PATCH v1 4/4] mm: remove boolean output parameters from
 folio_pte_batch_ext()

On Mon, Jun 30, 2025 at 01:16:52PM +0200, David Hildenbrand wrote:
>
> >
> > @ptentp: Pointer to a COPY of the first page table entry whose flags we update
> >           if appropriate.
>
> + * @ptentp: Pointer to a COPY of the first page table entry whose flags this
> + *         function updates based on @flags if appropriate.
>
>
> >
> > And then update the description of folio_pte_batch_flags() both the brief one to
> > add 'updates ptentp to set flags if appropriate' and maybe in the larger
> > description bit.
>
> Not in the brief one; the other description, including the excessive parameter doc
> will be enough.

That works for me! Let's not hold this up on trivia.

>
> FWIW, I briefly though passing in an arg struct, or returning the pte instead (and returning
> the nr_pages using a parameter), but hated both. More than these two stupid pte*.

Well I love help structs bro so you know I'd love that ;)

This version is fine with the updated param doc though!