On Wed, Oct 24, 2007 at 02:12:18PM +0200, Ingo Molnar wrote:
quoted text
> > 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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