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Message-ID: <20071024122148.GA2194@uranus.ravnborg.org>
Date: Wed, 24 Oct 2007 14:21:48 +0200
From: Sam Ravnborg <sam@...nborg.org>
To: Ingo Molnar <mingo@...e.hu>
Cc: Christoph Hellwig <hch@...radead.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
Subject: Re: Linux v2.6.24-rc1
On Wed, Oct 24, 2007 at 02:12:18PM +0200, Ingo Molnar wrote:
> > The Makefile stuff is trivial to merge.
>
> yes. But even Makefile merging can be surprisingly nontrivial at times:
> we had bugs in earlier versions of the unification due to link ordering
> and silent init section dependencies in the code. When we unified the
> makefiles certain init code broke because the initcall ordering changed.
> That's why we went for the "stupid, mechanic unification" approach first
> - to always have a 100% correct fallback position that people can bisect
> to.
With trivial I thought of:
ifeq ($(ARCH),x86_64)
include arch/x86/Makefile_64
else
include arch/x86/Makefile_32
endif
And common stuff could be put before/after the include.
Sam
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