linux-kernel - Re: [PATCH] ARM: Allow for kernel command line concatenation

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Message-ID: <20110407105850.GJ13963@pengutronix.de>
Date:	Thu, 7 Apr 2011 12:58:50 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Paul Bolle <pebolle@...cali.nl>
Cc:	oskar.andero@...yericsson.com, nicolas.pitre@...aro.org,
	linux@....linux.org.uk, catalin.marinas@....com,
	will.deacon@....com, linux-kernel@...r.kernel.org,
	eric.y.miao@...il.com, linux-arm-kernel@...ts.infradead.org,
	Victor Boivie <victor.boivie@...yericsson.com>
Subject: Re: [PATCH] ARM: Allow for kernel command line concatenation

On Thu, Apr 07, 2011 at 12:35:01PM +0200, Paul Bolle wrote:
> On Thu, 2011-04-07 at 10:17 +0200, oskar.andero@...yericsson.com wrote:
> > +config CMDLINE_EXTEND
> > +	bool "Extend bootloader kernel arguments"
> > +	depends on CMDLINE != ""
> > +	help
> > +	  The default kernel command string will be concatenated with the
> > +	  arguments provided by the boot loader.
> 
> This suggests the parameters provided by the boot loader will override
> corresponding parameters of the default kernel command string. Is that
> correct (for all possible parameters)?
> 
> Either way, shouldn't it be documented, perhaps in this help text, what
> will happen if a parameter of the default kernel command string and a
> parameter provided by the boot loader somehow conflict?
Then you will end up with both parameters I guess. What happens depends
on the parameter in question I guess. IMHO the description is fine.
But I wonder if the new mechanism is useful in the end.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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