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Date: Thu, 22 May 2008 02:36:08 +0100
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Harvey Harrison <harvey.harrison@gmail.com>,
       Paul Mackerras <paulus@samba.org>, Takashi Iwai <tiwai@suse.de>,
       linux-kernel@vger.kernel.org
Subject: Re: Moving include/asm-* [was: Re: Moving sound/* to drivers/ ?]
Message-ID: <20080522013608.GW28946@ZenIV.linux.org.uk>
References: <s5hzlqjz74d.wl%tiwai@suse.de> <alpine.LFD.1.10.0805211431370.3081@woody.linux-foundation.org> <18484.44691.477859.334222@cargo.ozlabs.ibm.com> <alpine.LFD.1.10.0805211635040.3081@woody.linux-foundation.org> <20080522005657.GU28946@ZenIV.linux.org.uk> <alpine.LFD.1.10.0805211818550.3081@woody.linux-foundation.org> <1211419419.6908.12.camel@brick> <alpine.LFD.1.10.0805211827010.3081@woody.linux-foundation.org>
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On Wed, May 21, 2008 at 06:29:43PM -0700, Linus Torvalds wrote:
> 
> 
> On Wed, 21 May 2008, Harvey Harrison wrote:
> > 
> > What about say, sparc64 that has a lot of #include <asm-sparc/foo.h>
> 
> Ahh, I didn't realize people did that.
> 
> I assume (but am too lazy to check) that UML probably does something 
> similar for its arch-specific stuff.

arch/um/include/*.h
arch/um/include/sysdep-<target>/*.h
include/asm-um/*.h

plus

arch/um/include/sysdep -> sysdep-<target>
and
include/asm-um/arch -> ../asm-<target>

Note that uml has two halves - kernel-side and userland-side.  The latter
is build with host search path, etc., with addition of arch/um/include.
The former is normal kernel code, with addition of arch/um/include again.
So some things in that sucker are for kernel-side and some - for userland
side...