linux-kernel - Re: [PATCH v6 2/4] mm/hwpoison: move definitions of num_poisoned_pages

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Date:   Thu, 13 Oct 2022 16:31:53 +0200
From:   Oscar Salvador <osalvador@...e.de>
To:     Naoya Horiguchi <naoya.horiguchi@...ux.dev>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Miaohe Lin <linmiaohe@...wei.com>,
        David Hildenbrand <david@...hat.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Yang Shi <shy828301@...il.com>,
        Muchun Song <songmuchun@...edance.com>,
        Jane Chu <jane.chu@...cle.com>,
        Naoya Horiguchi <naoya.horiguchi@....com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 2/4] mm/hwpoison: move definitions of
 num_poisoned_pages_* to memory-failure.c

On Fri, Oct 07, 2022 at 10:07:04AM +0900, Naoya Horiguchi wrote:
> From: Naoya Horiguchi <naoya.horiguchi@....com>
> 
> These interfaces will be used by drivers/base/memory.c by later patch, so as a
> preparatory work move them to more common header file visible to the file.
> 
> Signed-off-by: Naoya Horiguchi <naoya.horiguchi@....com>
> Reviewed-by: Miaohe Lin <linmiaohe@...wei.com>
> ---
> ChangeLog v3 -> v6:
> - remove static in definition of num_poisoned_pages_inc() to fix build error.
> 
> ChangeLog v2 -> v3:
> - added declaration of num_poisoned_pages_inc() in #ifdef CONFIG_MEMORY_FAILURE
> ---
>  arch/parisc/kernel/pdt.c |  3 +--
>  include/linux/mm.h       |  5 +++++
>  include/linux/swapops.h  | 24 ++----------------------
>  mm/memory-failure.c      | 10 ++++++++++
>  4 files changed, 18 insertions(+), 24 deletions(-)
> 
> diff --git a/arch/parisc/kernel/pdt.c b/arch/parisc/kernel/pdt.c
> index e391b175f5ec..fdc880e2575a 100644
> --- a/arch/parisc/kernel/pdt.c
> +++ b/arch/parisc/kernel/pdt.c
> @@ -18,8 +18,7 @@
>  #include <linux/kthread.h>
>  #include <linux/initrd.h>
>  #include <linux/pgtable.h>
> -#include <linux/swap.h>
> -#include <linux/swapops.h>
> +#include <linux/mm.h>

I am probably missing something.
num_poisoned_pages_* functions are in swapops.h, but why are you removing swap.h as well?

Also, reading the changelog it sounded like both functions would be in mm.h,
but actually only the _inc part is.

The rest looks good to me.
 

-- 
Oscar Salvador
SUSE Labs