linux-kernel - Re: [PATCH v3 03/16] mm/memory: slightly simplify copy_present

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Message-ID: <5bbf024d-225f-0aac-9abb-788e076f271a@suse.cz>
Date:   Mon, 11 Apr 2022 18:38:19 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     David Hildenbrand <david@...hat.com>, linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        David Rientjes <rientjes@...gle.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        John Hubbard <jhubbard@...dia.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Yang Shi <shy828301@...il.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Matthew Wilcox <willy@...radead.org>,
        Jann Horn <jannh@...gle.com>, Michal Hocko <mhocko@...nel.org>,
        Nadav Amit <namit@...are.com>, Rik van Riel <riel@...riel.com>,
        Roman Gushchin <guro@...com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Peter Xu <peterx@...hat.com>,
        Donald Dutile <ddutile@...hat.com>,
        Christoph Hellwig <hch@....de>,
        Oleg Nesterov <oleg@...hat.com>, Jan Kara <jack@...e.cz>,
        Liang Zhang <zhangliang5@...wei.com>,
        Pedro Gomes <pedrodemargomes@...il.com>,
        Oded Gabbay <oded.gabbay@...il.com>, linux-mm@...ck.org
Subject: Re: [PATCH v3 03/16] mm/memory: slightly simplify copy_present_pte()

On 3/29/22 18:04, David Hildenbrand wrote:
> Let's move the pinning check into the caller, to simplify return code
> logic and prepare for further changes: relocating the
> page_needs_cow_for_dma() into rmap handling code.
> 
> While at it, remove the unused pte parameter and simplify the comments a
> bit.
> 
> No functional change intended.
> 
> Signed-off-by: David Hildenbrand <david@...hat.com>

Yeah, much better.

Acked-by: Vlastimil Babka <vbabka@...e.cz>