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

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Date:   Mon, 8 Jun 2020 19:48:16 +0200
From:   SeongJae Park <sjpark@...zon.com>
To:     Christoph Hellwig <hch@...radead.org>
CC:     David Hildenbrand <david@...hat.com>,
        SeongJae Park <sjpark@...zon.com>, <akpm@...ux-foundation.org>,
        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>,
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        <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: Re: [PATCH v15 01/14] mm/page_ext: Export lookup_page_ext() to GPL modules

On Mon, 8 Jun 2020 08:49:17 -0700 Christoph Hellwig <hch@...radead.org> wrote:

> On Mon, Jun 08, 2020 at 01:53:23PM +0200, David Hildenbrand wrote:
> > > @@ -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).
> 
> A separate patch for anything remotely controversial really helps it
> to stick out, so I think keeping it separate is a very good practice.

I have no strong preference here.  So if no further comments are given, in the
next spin, I will keep this separate, but will mention exactly what future
commit needs this change, so that it can be easily squashed later, if
necessary.


Thanks,
SeongJae Park