linux-kernel - Re: [PATCH 00/12] kmap

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Date:	Mon, 25 Jun 2012 19:35:35 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Cong Wang <amwang@...hat.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	dhowells <dhowells@...hat.com>
Subject: Re: [PATCH 00/12] kmap_atomic cleanup for 3.6

On Mon, 2012-06-25 at 15:18 +0000, Arnd Bergmann wrote:
> > Different arch has different values for KM_TYPE_NR, I am not sure if
> > unifying them to a fixed value could fit all? 

No you can't. Some arch's have arch specific KM_TYPE thingies, like FRV.

> > For safety, I kept their original values.
> 
> My fear is that it will make it harder to clean that code up for
> real, when there is no longer an indication about where the number
> comes from.

Agreed, I'd much prefer it if we'd come up with a sane way to compute
the max value before doing away with these enums.

Sadly I haven't been able to come up with a sane way short of whole
program analysis.
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