linux-kernel - Re: [2.6 patch] ARM: always select HAVE

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Message-ID: <20080417132507.GA9314@cs181133002.pp.htv.fi>
Date:	Thu, 17 Apr 2008 16:25:07 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>,
	Sam Ravnborg <sam@...nborg.org>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-pcmcia@...ts.infradead.org
Subject: Re: [2.6 patch] ARM: always select HAVE_IDE

On Thu, Apr 17, 2008 at 12:00:05PM +0100, Russell King wrote:
> On Thu, Apr 17, 2008 at 01:48:36PM +0300, Adrian Bunk wrote:
> > On Thu, Apr 17, 2008 at 10:59:16AM +0100, Russell King wrote:
> > > On Thu, Apr 17, 2008 at 12:37:53PM +0300, Adrian Bunk wrote:
> > > > Any objections against the patch below?
> > > 
> > > Let's look at the rest of the situation surrounding HAVE_IDE first.
> > > It's something of a mess:
> > > 
> > > avr32, m68knommu, ppc, s390 and v850 do not have asm/ide.h
> > > 
> > > avr32, m68knommu, ppc, v850 all set HAVE_IDE, arch/s390/Kconfig contains
> > > no reference.
> > > 
> > > avr32 supports PATA (which is IDE).
> > > 
> > > Everything else provides an asm/ide.h and sets HAVE_IDE.
> > > 
> > > So:
> > > 
> > > Q1. Do avr32, m68knommu, ppc, v850 have IDE support or do they not?
> > 
> > avr32 is fixed in 2.6.25 (no more HAVE_IDE)
> 
> avr32 has ATA, so the only reason it doesn't actually use IDE is because
> they're using libata entirely.  This is NO different from the situation
> on ARM - some machine classes use entirely libata, others use IDE, and
> some others are trying to give up IDE in favour of libata.

You have a point that one might argue that avr32 should also select 
HAVE_IDE and get an asm/ide.h .

The main difference between avr32 and arm is that on arm there are a 
bunch of platforms that actually want to use drivers/ide/ at the moment, 
and the fine-grained select's we have at the moment don't bring any real 
gain.

I do actually not care much how this gets resolved (we could even 
ditch HAVE_IDE and provide asm/ide.h on all architectures) if there's 
general agreement that this is the way to go.

> Russell King

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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