From: Ian Collier <Ian.Collier@comlab.ox.ac.uk>
To: linux-kernel@vger.kernel.org
Subject: Re: 2.6.13: loop ioctl crashes
Date: Fri, 9 Sep 2005 14:38:04 +0100 [thread overview]
Message-ID: <20050909143804.A23692@pixie.comlab> (raw)
In-Reply-To: <Pine.LNX.4.61.0509090829260.8368@chaos.analogic.com>; from linux-os@analogic.com on Fri, Sep 09, 2005 at 08:32:10AM -0400
On Fri, Sep 09, 2005 at 08:32:10AM -0400, linux-os (Dick Johnson) wrote:
> I guess you are trying to do a copy_from_user() with a spin-lock
> being held or the interrupts otherwise disabled. You can hold
> a semaphore, to prevent somebody else from interfering with
> you, but you cannot hold a spin-lock during copy/to/from/user().
Well, I didn't write the code (it's right there in drivers/block/loop.c
in 2.6.13) and I can't see where there's a spin-lock. In fact it does
use a semaphore.
imc
next prev parent reply other threads:[~2005-09-09 13:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-09-09 12:27 2.6.13: loop ioctl crashes Ian Collier
2005-09-09 12:32 ` linux-os (Dick Johnson)
2005-09-09 13:38 ` Ian Collier [this message]
2005-09-09 14:41 ` linux-os (Dick Johnson)
2005-09-09 14:59 ` linux-os (Dick Johnson)
2005-09-09 15:42 ` Ian Collier
2005-09-14 12:51 ` 2.6.13: More on drivers/block/loop.c Ian Collier
2005-09-14 13:12 ` Anton Altaparmakov
2005-09-14 15:38 ` loop: auto-load crypto module [PATCH] Ian Collier
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