linux-kernel - Re: on builds/randconfigs

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Date:	Wed, 12 Jan 2011 14:54:53 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Len Brown <lenb@...nel.org>
CC:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-acpi@...r.kernel.org,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Zhang Rui <rui.zhang@...el.com>, linux-next@...r.kernel.org,
	LKML <linux-kernel@...r.kernel.org>,
	Zimny Lech <napohybelskurwysynom2010@...il.com>
Subject: Re: on builds/randconfigs

On 01/12/11 13:58, Len Brown wrote:
>>> These unusable config combinations should be prevented via Kconfig. 
>>> That prevents users from selecting them, which otherwise adds to
>>> our workload and to theirs.  It also prevents false-positives
>>> during our useful randconfig testing.
>>
>> But it is kind of difficult to achieve IMhO.  For example, there are options
>> that are only SELECTed if something else is set, but randconfig doesn't seem
>> to care.

s/randconfig/kconfig/


> Kconfig select needs to be fixed so that it is not possible to
> select something if that something's dependencies are not met.
> 
> This long standing issue is independent of randconfig,
> but Randy can probably attest that a measurable portion
> of the randconfig failures are due to this bug.

Certainly.  At least now we have a kconfig warning on this class of
problem.

-- 
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***
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