linux-kernel - Re: [2.6 patch] mark virt_to_bus/bus_to_virt as _

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Message-Id: <20061002215527.096a8762.akpm@osdl.org>
Date:	Mon, 2 Oct 2006 21:55:27 -0700
From:	Andrew Morton <akpm@...l.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Judith Lebzelter <judith@...l.org>, linuxppc-dev@...abs.org,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Adrian Bunk <bunk@...sta.de>
Subject: Re: [2.6 patch] mark virt_to_bus/bus_to_virt as __deprecated on
 i386

On Tue, 03 Oct 2006 14:49:39 +1000
Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:

> On Mon, 2006-10-02 at 21:44 -0700, Andrew Morton wrote:
> > On Tue, 03 Oct 2006 14:37:25 +1000
> > Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:
> > 
> > > > > You might want to convince Andrew accepting my patch to make 
> > > > > virt_to_bus/bus_to_virt give compile warnings on i386 for making
> > > > > people more aware of this problem...
> > > > >...
> > > 
> > > Andrew, is there any reason not to take that patch ?
> > 
> > It generates lots of warnings from drivers which nobody does any work on.
> > 
> > Net result: lots of new warnings, no fixed bugs.
> 
> Are you sure the warnings won't cause somebody like Al to go through
> them all and fix them ?

The drivers simply don't link on some architectures, due to missing
virt_to_bus/bus_to_virt.    They aren't hard to find.

> At least they should be marked either CONFIG_BROKEN or X86 only (or
> whatever arch they are supposed to be used on).
> 

Something like that would make sense.  I guess a new config option.
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