linux-kernel - Re: [PATCH 0/1] mspec driver: compile error

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Date:	Wed, 08 Nov 2006 19:52:54 +0900
From:	Fernando Luis Vázquez Cao 
	<fernando@....ntt.co.jp>
To:	Jes Sorensen <jes@....com>
Cc:	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	bjorn_helgaas@...com, Nick Piggin <nickpiggin@...oo.com.au>,
	Robin Holt <holt@....com>, Dean Nelson <dcn@....com>,
	Hugh Dickins <hugh@...itas.com>,
	Linus Torvalds <torvalds@...l.org>,
	linux-ia64 <linux-ia64@...r.kernel.org>,
	Tony Luck <tony.luck@...il.com>
Subject: Re: [PATCH 0/1] mspec driver: compile error

2006-11-08 (水) の 11:31 +0100 に Jes Sorensen さんは書きました:
> Andrew Morton wrote:
> > On Wed, 08 Nov 2006 18:45:30 +0900
> > Fernando Luis Vázquez Cao <fernando@....ntt.co.jp> wrote:
> >> On Wed, 2006-11-08 at 10:42 +0100, Jes Sorensen wrote:
> >>> Given that MSPEC is clearly marked as depending on IA64, it seems bogus
> >>> for i386 allmodconfig to barf over it and the problem should be fixed
> >>> there instead IMHO.
> >> Agreed. That is why I asked if that was allmodconfig's expected
> >> behaviour. Andrew?
> > 
> > kconfig's `select' isn't very smart.  This is one of the reasons why one
> > should avoid using it.
> 
> Hmmm, so what do we do? I really don't like the idea that one has to
> manually select the uncached allocator in order for mspec to be
> available.
> 
> Alternatively can move the Kconfig field for MSPEC to arch/ia64/Kconfig,
> but that seems a bit dodgy too.
The whole thing could be considered an "allmodconfig" bug. In this case,
"select" is working as expected on IA64 and automatically sets
IA64_UNCACHED_ALLOCATOR when MSPEC is selected.

Perhaps the right fix would be modifying allmodconfig so that it takes
into account dependecies (i.e. "depends on", "select", etc).

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