linux-kernel - Re: uses of cmpxchg/xadd in spinlock.h and rwsem.h vs. CONFIG

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Message-ID: <4A099DFC.7040905@zytor.com>
Date:	Tue, 12 May 2009 09:04:12 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Nick Piggin <npiggin@...e.de>
CC:	Jan Beulich <JBeulich@...ell.com>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org
Subject: Re: uses of cmpxchg/xadd in spinlock.h and rwsem.h vs. CONFIG_M386

Nick Piggin wrote:
> 
> Is it time to get rid of attempts to support SMP kernels that run on 386, then?
> Considering we don't actually support SMP 386, and if there is any 386 systems
> then they're going to be running custom kernels anyway.
> 

Makes sense to me.  We have never supported SMP 386 to the best of my
knowledge, and a patch to rip that out would be appreciated.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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