linux-kernel - Re: [PATCH -next] mm/memory-failure: fix redefinition of mf_generic_kill

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Date:   Wed, 29 Jun 2022 10:56:00 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     Zheng Bin <zhengbin13@...wei.com>, <naoya.horiguchi@....com>,
        <akpm@...ux-foundation.org>
CC:     <gaochao49@...wei.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] mm/memory-failure: fix redefinition of
 mf_generic_kill_procs

On 2022/6/28 19:21, Zheng Bin wrote:
> If CONFIG_HUGETLB_PAGE=n, building fails:
> 
> mm/memory-failure.c:1805:19: error: redefinition of ‘mf_generic_kill_procs’
>  static inline int mf_generic_kill_procs(unsigned long long pfn, int flags,
>                    ^~~~~~~~~~~~~~~~~~~~~
> mm/memory-failure.c:1564:12: note: previous definition of ‘mf_generic_kill_procs’ was here
>  static int mf_generic_kill_procs(unsigned long long pfn, int flags,
> 
> This patch fixes that.
> 
> Fixes: 4184e8d7d056 ("mm-factor-helpers-for-memory_failure_dev_pagemap-fix")
> Signed-off-by: Zheng Bin <zhengbin13@...wei.com>

Thanks for fixing this. mf_generic_kill_procs shouldn't depend on CONFIG_HUGETLB_PAGE.

Reviewed-by: Miaohe Lin <linmiaohe@...wei.com>

BTW: It seems there is a mess between CONFIG_HUGETLB_PAGE and CONFIG_FS_DAX. It's better
to fix it later.

> ---
>  mm/memory-failure.c | 7 -------
>  1 file changed, 7 deletions(-)
> 
> diff --git a/mm/memory-failure.c b/mm/memory-failure.c
> index 001fead45f30..c9931c676335 100644
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -1801,13 +1801,6 @@ static int try_memory_failure_hugetlb(unsigned long pfn, int flags, int *hugetlb
>  }
> 
>  #else
> -
> -static inline int mf_generic_kill_procs(unsigned long long pfn, int flags,
> -					struct dev_pagemap *pgmap)
> -{
> -	return 0;
> -}
> -
>  static inline int try_memory_failure_hugetlb(unsigned long pfn, int flags, int *hugetlb)
>  {
>  	return 0;
> --
> 2.31.1
> 
> .
>