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From: Arnd Bergmann <arnd@arndb.de>
To: Joshua Clayton <stillcompiling@gmail.com>
Cc: Grant Likely <grant.likely@linaro.org>, Rob Herring <robh+dt@kernel.org>,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC] New of_io_release_and_unmap()
Date: Wed, 25 Feb 2015 20:23:21 +0100
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On Wednesday 25 February 2015 11:20:41 Joshua Clayton wrote:
> Hello folks,
> I notice that io_request_and_map has no inverse.
> I would like to add a new function to undo what it does.
> 

What do you want to use this for? So far all users are in essential drivers
(clk and clocksource) that result in a boot failure if this goes wrong.

Normal drivers can probably always use devm_ioremap_resource(), which
has an automatic cleanup.

	Arnd