linux-kernel - Re: [PATCH 2/3] M68K: Use CONFIG_MMU not __uClinux_

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Message-ID: <20100902135438.GA23729@merkur.ravnborg.org>
Date:	Thu, 2 Sep 2010 15:54:38 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	David Howells <dhowells@...hat.com>
Cc:	gerg@...pgear.com, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/3] M68K: Use CONFIG_MMU not __uClinux__ to select
	m68knommu contributions

On Thu, Sep 02, 2010 at 11:21:58AM +0100, David Howells wrote:
> Use CONFIG_MMU not __uClinux__ to select m68knommu contributions as nothing in
> the arch defines __uClinux__ for the build.
> 
> This patch was achieved by running the following three commands:
> 
> perl -pi -e 's/ifdef __uClinux__/ifndef CONFIG_MMU/' `find arch/m68k -name "*.[ch]"`
> perl -pi -e 's/ifndef __uClinux__/ifdef CONFIG_MMU/' `find arch/m68k -name "*.[ch]"`
> perl -pi -e 's!endif /[*] __uClinux__ [*]/!endif /* CONFIG_MMU */!' `find arch/m68k -name "*.[ch]"

Have you verified that this does not leak out
to the userspace headers?
We cannot use the CONFIG_ symbol to distingush between
the two variants in userspace.

This was exactly the reason why __uClinux__ was used
in the first place. But I hope Geert/Greg has fixed
it up so all exported headers are the same so that
this patch is OK.

At first look I think it is OK - but your changelog
does not address this so wanted you to confirm this.

	Sam
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