linux-kernel - Re: [PATCH v8 1/7] mm, devm_memremap_pages: Mark devm_memremap_pages() EXPORT_SYMBOL

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Date:   Thu, 22 Nov 2018 17:40:36 +0100
From:   Christoph Hellwig <hch@....de>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Dan Williams <dan.j.williams@...el.com>, akpm@...ux-foundation.org,
        Jérôme Glisse <jglisse@...hat.com>,
        Christoph Hellwig <hch@....de>, torvalds@...ux-foundation.org,
        linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v8 1/7] mm, devm_memremap_pages: Mark
 devm_memremap_pages() EXPORT_SYMBOL_GPL

On Thu, Nov 22, 2018 at 05:38:58PM +0100, Christoph Hellwig wrote:
> On Thu, Nov 22, 2018 at 02:30:13PM +0100, Michal Hocko wrote:
> > Whoever needs a wrapper around arch_add_memory can do so because this
> > symbol has no restriction for the usage.
> 
> arch_add_memory is not exported, and it really should not be.

And in some older trees it oddly has an EXPORY_SYMBOL_GPL on x86
and sh, but no actual modular users..