linux-kernel - Re: [PATCH] sony_pi: Remove the BKL from sonypi_misc

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Message-Id: <200910200008.57468.arnd@arndb.de>
Date:	Tue, 20 Oct 2009 00:08:57 +0200
From:	Arnd Bergmann <arndbergmann@...glemail.com>
To:	Arnd Bergmann <arndbergmann@...glemail.com>
Cc:	John Kacur <jkacur@...hat.com>, linux-kernel@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH] sony_pi: Remove the BKL from sonypi_misc_open

On Tuesday 20 October 2009, Arnd Bergmann wrote:
> On Monday 19 October 2009, John Kacur wrote:
> > How does this look? (Version 2 of the patch follows)
> 
> Looks good now.
> 

A bit of background:

Doing only one of the two conversions is a correct patch as well
of course, I just want to make sure you don't have to go through all
the same files again once someone does a blind pushdown into the ioctl
and llseek functions, so once you prove that a specific driver doesn't
need the BKL, please always make sure to remove it from all three places.

I fear that the llseek part will get interesting as well, just because
we call default_llseek instead of no_ll by default currently.
It might be a good idea to add one of .llseek=no_llseek or 
.llseek=generic_file_llseek in any file_operations that you prove
to not require the BKL.

	Arnd <><
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