linux-kernel - Re: [PATCH 2.4.32] Fix AVM C4 ISDN card init problems with newer CPUs

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Message-ID: <20060804050843.GB8776@1wt.eu>
Date:	Fri, 4 Aug 2006 07:08:43 +0200
From:	Willy Tarreau <w@....eu>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Jukka Partanen <jspartanen@...il.com>, kkeil@...e.de,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.4.32] Fix AVM C4 ISDN card init problems with newer CPUs

On Thu, Aug 03, 2006 at 06:56:15PM +0100, Alan Cox wrote:
> Ar Iau, 2006-08-03 am 19:53 +0300, ysgrifennodd Jukka Partanen:
> > AVM C4 ISDN NIC: Add three memory barriers, taken from 2.6.7,
> > (they are there in 2.6.17.7 too), to fix module initialization
> > problems appearing with at least some newer Celerons and
> > Pentium III.
> 
> Should be using cpu_relax() I think. Its a polled busy loop so you want
> other CPU threads to run if possible.

Agreed, but I think it should be a second patch since 2.6 would need it
too.

> Otherwise the code seems quite logical depending how c4inmeml is defined.

OK, I'm queuing it for 2.4.34.

> Alan

Willy

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