linux-kernel - Re: [PATCH] Introduce compat_u64 and compat

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Message-ID: <20070615135420.7fe2e4c1@the-village.bc.nu>
Date:	Fri, 15 Jun 2007 13:54:20 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Andi Kleen <ak@...e.de>
Cc:	David Howells <dhowells@...hat.com>, Arnd Bergmann <arnd@...db.de>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Dave Airlie <airlied@...ux.ie>, linux-arch@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Introduce compat_u64 and compat_s64 types

> > > Why does it break them? It should just make them a little slower.
> > Not all CPUs deliver recoverable misalignment exceptions.   
> These CPUs are too broken to run Linux then.

People fixed that up
> 
> > > The network code requires unaligned accesses to work anyways so if your
> > > architecture doesn't support them it is already remotely crashable.
> >
> > I thought we'd fixed all that.
> 
> Did you audit the complete network stack?

For the parts used by the processors in question yes people have done
that work so using the types without unaligned.

Alan
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