linux-kernel - Re: [PATCH v15 01/14] mm/page_ext: Export lookup_page

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Message-ID: <cf508f7e-925c-790c-7477-9a1d8150336d@redhat.com>
Date:   Mon, 8 Jun 2020 13:53:23 +0200
From:   David Hildenbrand <david@...hat.com>
To:     SeongJae Park <sjpark@...zon.com>, akpm@...ux-foundation.org
Cc:     SeongJae Park <sjpark@...zon.de>, Jonathan.Cameron@...wei.com,
        aarcange@...hat.com, acme@...nel.org,
        alexander.shishkin@...ux.intel.com, amit@...nel.org,
        benh@...nel.crashing.org, brendan.d.gregg@...il.com,
        brendanhiggins@...gle.com, cai@....pw, colin.king@...onical.com,
        corbet@....net, dwmw@...zon.com, foersleo@...zon.de,
        irogers@...gle.com, jolsa@...hat.com, kirill@...temov.name,
        mark.rutland@....com, mgorman@...e.de, minchan@...nel.org,
        mingo@...hat.com, namhyung@...nel.org, peterz@...radead.org,
        rdunlap@...radead.org, riel@...riel.com, rientjes@...gle.com,
        rostedt@...dmis.org, sblbir@...zon.com, shakeelb@...gle.com,
        shuah@...nel.org, sj38.park@...il.com, snu@...zon.de,
        vbabka@...e.cz, vdavydov.dev@...il.com, yang.shi@...ux.alibaba.com,
        ying.huang@...el.com, linux-damon@...zon.com, linux-mm@...ck.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v15 01/14] mm/page_ext: Export lookup_page_ext() to GPL
 modules

On 08.06.20 13:40, SeongJae Park wrote:
> From: SeongJae Park <sjpark@...zon.de>
> 
> This commit exports 'lookup_page_ext()' to GPL modules.  This will be
> used by DAMON.
> 
> Signed-off-by: SeongJae Park <sjpark@...zon.de>
> Reviewed-by: Leonard Foerster <foersleo@...zon.de>
> ---
>  mm/page_ext.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/mm/page_ext.c b/mm/page_ext.c
> index a3616f7a0e9e..9d802d01fcb5 100644
> --- a/mm/page_ext.c
> +++ b/mm/page_ext.c
> @@ -131,6 +131,7 @@ struct page_ext *lookup_page_ext(const struct page *page)
>  					MAX_ORDER_NR_PAGES);
>  	return get_entry(base, index);
>  }
> +EXPORT_SYMBOL_GPL(lookup_page_ext);
>  
>  static int __init alloc_node_page_ext(int nid)
>  {
> 

I've been told to always smuggle new EXPORTs into the patch that
actually needs it (and cc relevant people on that patch instead).

-- 
Thanks,

David / dhildenb