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Date:   Fri, 16 Aug 2019 14:00:57 -0700
From:   Andrew Morton <akpm@linux-foundation.org>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Dan Williams <dan.j.williams@intel.com>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Bharata B Rao <bharata@linux.ibm.com>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org
Subject: Re: [PATCH 4/4] memremap: provide a not device managed
 memremap_pages
Message-Id: <20190816140057.c1ab8b41b9bfff65b7ea83ba@linux-foundation.org>
In-Reply-To: <20190816065434.2129-5-hch@lst.de>
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        <20190816065434.2129-5-hch@lst.de>
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On Fri, 16 Aug 2019 08:54:34 +0200 Christoph Hellwig <hch@lst.de> wrote:

> The kvmppc ultravisor code wants a device private memory pool that is
> system wide and not attached to a device.  Instead of faking up one
> provide a low-level memremap_pages for it.  Note that this function is
> not exported, and doesn't have a cleanup routine associated with it to
> discourage use from more driver like users.

Confused. Which function is "not exported"?

> +EXPORT_SYMBOL_GPL(memunmap_pages);
> +EXPORT_SYMBOL_GPL(memremap_pages);
>  EXPORT_SYMBOL_GPL(devm_memremap_pages);