linux-kernel - Re: [GIT PULL] omap changes for v2.6.39 merge window

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Date:	Thu, 31 Mar 2011 10:06:34 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Nicolas Pitre <nico@...xnic.net>
Cc:	david@...g.hm, Linus Torvalds <torvalds@...ux-foundation.org>,
	Arnd Bergmann <arnd@...db.de>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Tony Lindgren <tony@...mide.com>,
	David Brown <davidb@...eaurora.org>,
	lkml <linux-kernel@...r.kernel.org>,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
	Catalin Marinas <catalin.marinas@....com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [GIT PULL] omap changes for v2.6.39 merge window

* Nicolas Pitre <nico@...xnic.net> wrote:

> On Wed, 30 Mar 2011, david@...g.hm wrote:
> 
> > back in the early days of the PCs, different systems from different vendors
> > had different bus types, peripherals at different addresses, etc. that didn't
> > make all of those vendors systems different architectures, instead those
> > things were varients of the x86 architecture.
> 
> Most of them didn't survive.  That really helps.

That's not the point, 99% of the current ARM boards will not 'survive' either, 
10-20 years down the road.

I think you missed David's main point: life inevitably went on and few of the 
old x86 hardware 'survived' physically, but past hardware versions have not 
littered the kernel source with half a million lines of source code in the 
process ...

Having strong, effective platform abstractions inside the kernel really helps 
even if the hardware space itself is inevitably fragmented: both powerpc and 
x86 has shown that. Until you realize and appreciate that you really have not 
understood the problem i think.

Thanks,

	Ingo
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