linux-kernel - Re: [patch 11/28] nvram: Drop the bkl from nvram

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Message-Id: <200910112350.24870.arnd@arndb.de>
Date:	Sun, 11 Oct 2009 23:50:24 +0200
From:	Arnd Bergmann <arndbergmann@...glemail.com>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Arnd Bergmann <arndbergmann@...glemail.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>,
	Vincent Sanders <vince@...tec.co.uk>,
	John Kacur <jkacur@...hat.com>,
	Jonathan Corbet <corbet@....net>,
	Christoph Hellwig <hch@...radead.org>,
	"Sven-Thorsten Dietrich" <sven@...bigcorporation.com>,
	Alessio Igor Bogani <abogani@...ware.it>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Greg KH <gregkh@...e.de>
Subject: Re: [patch 11/28] nvram: Drop the bkl from nvram_llseek()

On Sunday 11 October 2009, Frederic Weisbecker wrote:
> Now I'm adding the ioctl() sites too:
> 
> git-grep "\.ioctl *=" | grep -P "^\S+\.c" | wc -l
> 452
> 
> Hehe :)

Not all of them, fortunately.

There are various *_operations structures that have a .ioctl pointer.
While there are a lot of struct file_operations with a locked .ioctl
operation, stuff like block_device_operations does not hold the
BKL in .ioctl but in .locked_ioctl.

	Arnd <><
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