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Subject: Re: [Patch v2 4/4] mm/page_alloc.c: extract commom part to check page
To:     Wei Yang <richardw.yang@linux.intel.com>, akpm@linux-foundation.org
Cc:     linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        rientjes@google.com
References: <20200120030415.15925-1-richardw.yang@linux.intel.com>
 <20200120030415.15925-5-richardw.yang@linux.intel.com>
From:   Anshuman Khandual <anshuman.khandual@arm.com>
Message-ID: <3987ae0f-cbfc-1066-c78f-c5c6efc570ed@arm.com>
Date:   Mon, 20 Jan 2020 12:13:38 +0530
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On 01/20/2020 08:34 AM, Wei Yang wrote:
> During free and new page, we did some check on the status of page
> struct. There is some common part, just extract them.

Makes sense.

> 
> Besides this, this patch also rename two functions to keep the name
> convention, since free_pages_check_bad/free_pages_check are counterparts
> of check_new_page_bad/check_new_page.

This probably should be in a different patch.

> 
> Signed-off-by: Wei Yang <richardw.yang@linux.intel.com>
> ---
>  mm/page_alloc.c | 49 ++++++++++++++++++++++++-------------------------
>  1 file changed, 24 insertions(+), 25 deletions(-)
> 
> diff --git a/mm/page_alloc.c b/mm/page_alloc.c
> index a7b793c739fc..7f23cc836f90 100644
> --- a/mm/page_alloc.c
> +++ b/mm/page_alloc.c
> @@ -1025,36 +1025,44 @@ static inline bool page_expected_state(struct page *page,
>  	return true;
>  }
>  
> -static void free_pages_check_bad(struct page *page)
> +static inline int __check_page(struct page *page, int nr,
> +				const char **bad_reason)

free and new page checks are in and out of the buddy allocator, hence
this common factored function should have a more relevant name.