linux-kernel - Re: [PATCH] video4linux: Push down the BKL

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Message-ID: <20080526220154.GA15487@devserv.devel.redhat.com>
Date:	Mon, 26 May 2008 18:01:54 -0400
From:	Alan Cox <alan@...hat.com>
To:	Mauro Carvalho Chehab <mchehab@...radead.org>
Cc:	Alan Cox <alan@...hat.com>, video4linux-list@...hat.com,
	linux-kernel@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] video4linux: Push down the BKL

On Mon, May 26, 2008 at 06:10:27PM -0300, Mauro Carvalho Chehab wrote:
> The hardest and optimal scenario is to look inside all drivers, fix the locks
> (and pray for a further patch to not break them). I'm afraid that this is a long
> term strategy.

Ultimately that is where you end up.

> For example, a very simple scenario would simply replace BKL by one mutex.
> This way, just one ioctl could be handled at the same time. This is something

video2_ioctl_serialized() ?
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