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

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Message-Id: <1154627776.23655.106.camel@localhost.localdomain>
Date:	Thu, 03 Aug 2006 18:56:15 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Jukka Partanen <jspartanen@...il.com>
Cc:	kkeil@...e.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.4.32] Fix AVM C4 ISDN card init problems with newer
	CPUs

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

Alan

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