linux-kernel - Re: devtmpfs [censored] oddities

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Message-ID: <20091217003922.GB4863@suse.de>
Date:	Wed, 16 Dec 2009 16:39:22 -0800
From:	Greg KH <gregkh@...e.de>
To:	Al Viro <viro@...IV.linux.org.uk>
Cc:	linux-kernel@...r.kernel.org, Kay Sievers <kay.sievers@...y.org>
Subject: Re: devtmpfs [censored] oddities

On Wed, Dec 16, 2009 at 08:04:31AM +0000, Al Viro wrote:
> 	May I respectfully suggest that a blocking operation (such as
> kstrdup with GFP_KERNEL, or grabbing a mutex, or, say it, pathname resolution)
> is not quite the thing to do while holding an rwlock?
> 
> 	As it is, any device_add() is an embarrassingly obvious deadlock
> waiting to happen...

Thomas has posted a patch to fix this now.

Sorry for not catching it sooner, we should just delete the rwlocks so
no one tries to ever use it again.

thanks,

greg k-h
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