linux-kernel - Re: [PATCH] kernel/resource.c: fix muxed resource handling in __request

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Message-ID: <1456148952.24303.273.camel@linux.intel.com>
Date:	Mon, 22 Feb 2016 13:49:12 +0000
From:	Alan Cox <alan@...ux.intel.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Vincent Pelletier <plr.vincent@...il.com>,
	Simon Guinot <simon.guinot@...uanux.org>,
	Giel van Schijndel <me@...tis.eu>,
	linux-gpio@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Vincent Donnefort <vdonnefort@...il.com>,
	Yoann Sculo <yoann@...lo.fr>
Subject: Re: [PATCH] kernel/resource.c: fix muxed resource handling in
 __request_region()

> we have some good alternatives in the form of bus and platform
> drivers that
> can manage the appropriate serialization and keep things from
> stomping
> on one another.

It's not used much, especially nowdays. The use case is basically multi
I/O chips on the ISA/LPC bus with magic shared config register ports.

We have sufficiently few of those we could give muxed the boot and
special case them if preferred.

Alan