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Date: Wed, 28 Nov 2001 23:45:05 +0000
From: Russell King <rmk@arm.linux.org.uk>
To: "David C. Hansen" <haveblue@us.ibm.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] remove BKL from drivers' release functions
Message-ID: <20011128234505.C2561@flint.arm.linux.org.uk>
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In-Reply-To: <3C057410.3090201@us.ibm.com>; from haveblue@us.ibm.com on Wed, Nov 28, 2001 at 03:32:32PM -0800
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On Wed, Nov 28, 2001 at 03:32:32PM -0800, David C. Hansen wrote:
> Nothing, because the BKL is not held for all opens anymore.  In most of 
> the cases that we addressed, the BKL was in release _only_, not in open 
> at all.  There were quite a few drivers where we added a spinlock, or 
> used atomic operations to keep open from racing with release.  

All char and block devs are opened with the BKL held - see chrdev_open in
fs/devices.c and do_open in fs/block_dev.c

--
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html

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