linux-kernel - Re: [PATCH v2 1/2] mm: introduce pmd

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Message-ID: <20210831232301.ilehcpc3n5bqodsz@box.shutemov.name>
Date:   Wed, 1 Sep 2021 02:23:01 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Qi Zheng <zhengqi.arch@...edance.com>
Cc:     akpm@...ux-foundation.org, tglx@...utronix.de, hannes@...xchg.org,
        mhocko@...nel.org, vdavydov.dev@...il.com,
        kirill.shutemov@...ux.intel.com, mika.penttila@...tfour.com,
        david@...hat.com, vbabka@...e.cz, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        songmuchun@...edance.com
Subject: Re: [PATCH v2 1/2] mm: introduce pmd_install() helper

On Tue, Aug 31, 2021 at 09:21:10PM +0800, Qi Zheng wrote:
> Currently we have three times the same few lines repeated in the
> code. Deduplicate them by newly introduced pmd_install() helper.
> 
> Signed-off-by: Qi Zheng <zhengqi.arch@...edance.com>
> Reviewed-by: David Hildenbrand <david@...hat.com>
> Reviewed-by: Muchun Song <songmuchun@...edance.com>
> ---
>  include/linux/mm.h |  1 +
>  mm/filemap.c       | 11 ++---------
>  mm/memory.c        | 34 ++++++++++++++++------------------
>  3 files changed, 19 insertions(+), 27 deletions(-)
> 
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index a3cc83d64564..0af420a7e382 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -2463,6 +2463,7 @@ static inline spinlock_t *pud_lock(struct mm_struct *mm, pud_t *pud)
>  	return ptl;
>  }
>  
> +extern void pmd_install(struct mm_struct *mm, pmd_t *pmd, pgtable_t *pte);
>  extern void __init pagecache_init(void);
>  extern void __init free_area_init_memoryless_node(int nid);
>  extern void free_initmem(void);

mm/internal.h would be a better fit for the declaration.

Otherwise:

Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
 Kirill A. Shutemov