linux-kernel - Re: [PATCH 1/6] mm: Make __dump

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Message-ID: <b54d29a1-4dcb-d3d3-e992-616e1da05d72@suse.cz>
Date:   Fri, 23 Apr 2021 16:49:47 +0200
From:   Vlastimil Babka <vbabka@...e.cz>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>, linux-mm@...ck.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/6] mm: Make __dump_page static

On 4/17/21 1:15 AM, Matthew Wilcox (Oracle) wrote:
> The only caller of __dump_page() now opencodes dump_page(), so
> remove it as an externally visible symbol.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>

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

> ---
>  include/linux/mmdebug.h | 3 +--
>  mm/debug.c              | 2 +-
>  mm/page_alloc.c         | 3 +--
>  3 files changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
> index 5d0767cb424a..1935d4c72d10 100644
> --- a/include/linux/mmdebug.h
> +++ b/include/linux/mmdebug.h
> @@ -9,8 +9,7 @@ struct page;
>  struct vm_area_struct;
>  struct mm_struct;
>  
> -extern void dump_page(struct page *page, const char *reason);
> -extern void __dump_page(struct page *page, const char *reason);
> +void dump_page(struct page *page, const char *reason);
>  void dump_vma(const struct vm_area_struct *vma);
>  void dump_mm(const struct mm_struct *mm);
>  
> diff --git a/mm/debug.c b/mm/debug.c
> index 0bdda8407f71..84cdcd0f7bd3 100644
> --- a/mm/debug.c
> +++ b/mm/debug.c
> @@ -42,7 +42,7 @@ const struct trace_print_flags vmaflag_names[] = {
>  	{0, NULL}
>  };
>  
> -void __dump_page(struct page *page, const char *reason)
> +static void __dump_page(struct page *page, const char *reason)
>  {
>  	struct page *head = compound_head(page);
>  	struct address_space *mapping;
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index 5a35f21b57c6..0152670c6f04 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -658,8 +658,7 @@ static void bad_page(struct page *page, const char *reason)
>  
>  	pr_alert("BUG: Bad page state in process %s  pfn:%05lx\n",
>  		current->comm, page_to_pfn(page));
> -	__dump_page(page, reason);
> -	dump_page_owner(page);
> +	dump_page(page, reason);
>  
>  	print_modules();
>  	dump_stack();
>