linux-kernel - Support arch/$ARCH/include in kbuild

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Message-ID: <20080621220703.GA12279@uranus.ravnborg.org>
Date:	Sun, 22 Jun 2008 00:07:03 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	LKML <linux-kernel@...r.kernel.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Support arch/$ARCH/include in kbuild

Linus hinted that he liked to have all arch specific
header files moved from include/asm-$ARCH to
arch/$ARCH/include/asm.

The following two patches implement the basic support
for this.

I have used sparc for my testing and to some degree
I also used i386.

For sparc I just had to do a simple:

    mkdir -p arch/sparc/include/asm
    mv include/asm-sparc/* arch/sparc/include/asm

to build sparc with the new directory layout.

For i386 I had to do a few trivial path fixes in
arch/x86/Makefile and to fix the include of unistd_32.h
in one place to fix the build.

I expect a few additional bits to show up when people
start to move their header files but this should
be a good starting point.

To support arch/$ARCH/include/ was done in two steps.

First was to teach make headers_* about the new layout.
And second step was to get the build fixed with the new
layout.

Patches are on top of kbuild-next.git and follows.

	Sam
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