linux-kernel - Re: [PATCH v12 05/11] edma: config: Enable config options for EDMA

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <201306211632.12577.arnd@arndb.de>
Date:	Fri, 21 Jun 2013 16:32:12 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Joel A Fernandes <agnel.joel@...il.com>
Cc:	Sekhar Nori <nsekhar@...com>, Joel A Fernandes <joelagnel@...com>,
	Tony Lindgren <tony@...mide.com>,
	Matt Porter <matt@...orter.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Rob Herring <rob.herring@...xeda.com>,
	Vinod Koul <vinod.koul@...el.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Benoit Cousson <b-cousson@...com>,
	Russell King <linux@....linux.org.uk>,
	Rob Landley <rob@...dley.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jason Kridner <jkridner@...gleboard.org>,
	Koen Kooi <koen@...gleboard.org>,
	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Documentation List <linux-doc@...r.kernel.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Linux SPI Devel List 
	<spi-devel-general@...ts.sourceforge.net>
Subject: Re: [PATCH v12 05/11] edma: config: Enable config options for EDMA

On Friday 21 June 2013, Joel A Fernandes wrote:
> I haven't come across this problem but- are you saying there is a
> shortcoming in Kbuild/Kconfig that selects an option even if its
> dependency is not met?

Well, the shortcoming is that it lets you specify impossible
contraints. You get a warning from Kconfig when building
such a configuration, but then it continues.

> The problem with defconfig is also too many options I feel for a common case.
> CONFIG_DMADEVICES=y
> CONFIG_TI_EDMA=y
> 
> Most if not all future OMAPs from will use EDMA. Why not we can be
> explicit about it and just built it in anyway. If ARCH_OMAP and
> DMADEVICES are selected, then we can just build EDMA in by default.

It's just not how we do things. Kconfig is a mess because we are
not consistent in the way this is done.

> I agree maybe the option can be dropped from Davinci but I suggest
> let's keep it for OMAP. Is that ok?

No, I would still like you to not add it to either one. I'm spending
a lot of my time tracking down incorrect 'select' statements and I'd
rather spend it in a different way. I've had to a number of 'select'
statements from OMAP in the past, please don't add any new ones
unless there is a strict build dependency (which normally should not
exist).

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/