linux-kernel - Re: [PATCH] Re: Sparc32: random invalid instruction occourances on sparc32 (sun4c)

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Message-Id: <1183500096.29081.51.camel@shinybook.infradead.org>
Date:	Tue, 03 Jul 2007 18:01:36 -0400
From:	David Woodhouse <dwmw2@...radead.org>
To:	David Miller <davem@...emloft.net>
Cc:	mark@...hpc.demon.co.uk, linux-mm@...ck.org,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	sparclinux@...r.kernel.org, clameter@...r.sgi.com,
	wli@...omorphy.com
Subject: Re: [PATCH] Re: Sparc32: random invalid instruction occourances on
	sparc32 (sun4c)

On Tue, 2007-07-03 at 14:41 -0700, David Miller wrote:
> Please don't use get_unaligned() or whatever to fix this, it's
> going to generate the byte-at-a-time accesses on sparc64
> which doesn't need it since the redzone will be aligned. 

Yes, get_unaligned() would suck. But 'u64 __aligned__((BYTES_PER_WORD))'
as I suggested should result in a single 64-bit load on 64-bit
architectures, and two 32-bit loads on 32-bit architectures.

But I think the patch I just sent is a better option than that anyway.

-- 
dwmw2

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