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Re: CVS Update@-mips.org: linux

To: "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>
Subject: Re: CVS Update@-mips.org: linux
From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 2 Feb 2004 16:23:07 +0100
Cc: linux-mips@linux-mips.org
In-reply-to: <Pine.LNX.4.55.0402021611490.6182@jurand.ds.pg.gda.pl>
Original-recipient: rfc822;linux-mips@linux-mips.org
References: <20040202141939Z8225226-9616+1555@linux-mips.org> <Pine.LNX.4.55.0402021611490.6182@jurand.ds.pg.gda.pl>
Sender: linux-mips-bounce@linux-mips.org
User-agent: Mutt/1.4.1i
On Mon, Feb 02, 2004 at 04:13:28PM +0100, Maciej W. Rozycki wrote:

> >     PMC-Sierra says that the workaround for errata #18 of the R4600 V1.7
> >     and a similar erratum in V2.0 don't require disabling of interrupts,
> >     so remove that code.
> 
>  How do we assure tails of interrupt handlers don't trigger the errata?

The problem can only be triggered if instructions surrounding the
cacheop use the dcache; exceptions such as interrupts are not relevant.

Which I'm really happy about.  Disabling interrupts is a problem in cases
were we can't avoid page faults.

  Ralf

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