linux-kernel - Re: [patch 1/1] Switch ioctl functions of drivers/scsi/sg.c to unlocked

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Message-Id: <1199995772.3141.90.camel@localhost.localdomain>
Date:	Thu, 10 Jan 2008 14:09:32 -0600
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Andre Noll <maan@...temlinux.org>
Cc:	Andi Kleen <andi@...stfloor.org>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Richard Knutsson <ricknu-0@...dent.ltu.se>
Subject: Re: [patch 1/1] Switch ioctl functions of drivers/scsi/sg.c to
	unlocked_ioctl


On Thu, 2008-01-10 at 20:45 +0100, Andre Noll wrote:
> On 20:29, Andi Kleen wrote:
> 
> > > Sure, I can do that if James likes the idea. Since not all case
> > > statements need the BKL, we could add it only to those for which it
> > > isn't clear that it is unnecessary.
> > > 
> > > And this would actually improve something.
> > 
> > I still think it would be a good strategy to first add it to all
> > (in a essentially nop semantics patch) and then later eliminate
> > it from the cases that obviously don't need it. 
> 
> James, would you accept such a patch?

Our current suspicion is that none of the SCSI ioctl paths require the
BKL.  Al Viro said he'd try to look into this, so currently I think the
conversion path is just to move .ioctl -> .unlocked_ioctl

However, more eyes on the problem would be most welcome.

James


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