linux-kernel - Re: [PATCH 1/5] um: Use __i386__ in ifdef for vsyscall exports, not SUBARCH

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Date:	Sun, 31 Jul 2011 23:58:01 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	richard -rw- weinberger <richard.weinberger@...il.com>,
	Arnaud Lacombe <lacombar@...il.com>,
	"H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org,
	linux-kbuild@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: [PATCH 1/5] um: Use __i386__ in ifdef for vsyscall exports, not
 SUBARCH_i386

On Sun, Jul 31, 2011 at 11:48:35PM +0100, Al Viro wrote:
> On Sun, Jul 31, 2011 at 11:24:21PM +0100, David Woodhouse wrote:
> > On Mon, 2011-08-01 at 00:11 +0200, richard -rw- weinberger wrote:
> > > 
> > > Why do we need this? 
> > 
> > The arch/x86_64 and arch/i386 directories were removed from the kernel
> > four years ago, and replaced by the 'x86' arch. UML is still dependent
> > on the legacy SUBARCH=i386 and SUBARCH=x86_64 settings, and the patch
> > sequence I just posted makes it cope with SUBARCH=x86.
> 
> Hell, no.  If you want to do it, do it the right way.  See #x86_merge in
> git://git.kernel.org/pub/scm/linux/kernel/git/viro/um-header.git/

FWIW, the next step (still not pushed there) is to move arch/um/sys-x86 to
arch/x86/um, with arch/um/os-Linux/sys-x86 becoming arch/x86/um/os-Linux,
Kconfig.x86 moving to arch/x86/um/Kconfig and Makefile-x86 - to
arch/x86/um/Makefile.defs.  Next after that - arch/powerpc/um (and yes,
it means resurrected uml/ppc port; for now - only ppc32, since I have no
ppc64 boxen to test on).
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