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Date: Tue, 6 Nov 2001 02:03:59 -0500 (EST)
From: Alexander Viro <viro@math.psu.edu>
To: Richard Gooch <rgooch@ras.ucalgary.ca>
cc: alain@linux.lu, Linus Torvalds <torvalds@transmeta.com>,
        linux-kernel@vger.kernel.org
Subject: Re: Poor floppy performance in kernel 2.4.10 
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On Tue, 6 Nov 2001, Richard Gooch wrote:

> Alexander Viro writes:
> > 	BTW, here's one more devfs rmmod race: check_disk_changed() in
> > fs/devfs/base.c.  Calling ->check_media_change() with no protection
> > whatsoever.  If rmmod happens at that point...
> 
> How is this different from a call to fs/block_dev.c:check_disk_change()
> which also has no protection?

It's called either from driver itself (and then whatever protects caller
protects it as well) or after we'd pinned the thing down by blkdev_get().

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