linux-kernel - Re: [PATCH 1/3] Maple bus support for the Sega Dreamcast

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Date:	Sun, 9 Sep 2007 19:44:28 +0100
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Adrian McMenamin" <lkmladrian@...il.com>
Cc:	"Paul Mundt" <lethal@...ux-sh.org>,
	linuxsh-dev@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] Maple bus support for the Sega Dreamcast

On Sun, 9 Sep 2007 19:36:52 +0100
"Adrian McMenamin" <lkmladrian@...il.com> wrote:

> Fair enough.
> 
> > > +
> > > +void maple_add_packet(struct mapleq *mq)
> > > +{
> > > +     list_add((struct list_head *) mq, &maple_waitq);
> > > +}
> >
> > for example this list.. what makes sure that no 2 pieces of code
> > muck with it at the same time?
> >
> >
> 
> Because everything is handled by one kernel thread on a uniprocessor
> machine.

hmmm.... still. Once you look at it from any other place... preempt etc
etc... it's sort of playing russian roulette with an empty gun, but
without checking that the gun is actually empty... at some point
someone may accidentally leave a bullet in ;)
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