From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>,
Virtualization Mailing List <virtualization@lists.osdl.org>,
Rusty Russell <rusty@rustcorp.com.au>,
LKML <linux-kernel@vger.kernel.org>,
Linux PPC devel <linuxppc-dev@ozlabs.org>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: [RFC 1/3] hvc_console: rework setup to replace irq functions with callbacks
Date: Mon, 13 Oct 2008 20:52:59 +1100 [thread overview]
Message-ID: <1223891579.8157.251.camel@pasglop> (raw)
In-Reply-To: <200810131047.12748.borntraeger@de.ibm.com>
On Mon, 2008-10-13 at 10:47 +0200, Christian Borntraeger wrote:
> > I will try. Of course the risk here is that the interrupt happens
> > after we set hp->tty to NULL, so we probably need to check within the
> > interrupt handler for a NULL tty. I haven't checked if that's the case
> > (I'm not in front of the code right now).
>
> Even the old code (without my patch) was setting hp->tty to NULL before doing
> the irq_free, so that should be ok.
Yup, just checked, it should be allright as long as it's cleared with
the spinlock held, which seems to be the case with your patch. I'll test
your fixup patch tomorrow to see if it clears the lockdep error.
Thanks !
Ben.
next prev parent reply other threads:[~2008-10-13 9:55 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-03 12:44 [RFC 0/3]: hvc_console rework for platform without hard irqs Christian Borntraeger
2008-06-03 12:45 ` [RFC 1/3] hvc_console: rework setup to replace irq functions with callbacks Christian Borntraeger
2008-06-04 0:13 ` Rusty Russell
2008-06-04 11:15 ` Christian Borntraeger
2008-10-13 5:16 ` Benjamin Herrenschmidt
2008-10-13 7:51 ` Christian Borntraeger
2008-10-13 8:36 ` Benjamin Herrenschmidt
2008-10-13 8:47 ` Christian Borntraeger
2008-10-13 9:52 ` Benjamin Herrenschmidt [this message]
2008-10-14 0:38 ` Benjamin Herrenschmidt
2008-10-14 6:42 ` Christian Borntraeger
2008-10-14 8:18 ` Benjamin Herrenschmidt
2008-06-03 12:46 ` [RFC 2/3] virtio_console: use virtqueue notification for hvc_console Christian Borntraeger
2008-06-03 17:24 ` Arnd Bergmann
2008-06-03 12:46 ` [RFC 3/3] s390: use virtio_console for KVM on s390 Christian Borntraeger
2008-06-03 12:49 ` [RFC 1/3] hvc_console: rework setup to replace irq functions with callbacks (not word wrapped) Christian Borntraeger
2008-06-03 17:30 ` Arnd Bergmann
2008-06-04 8:00 ` Christian Borntraeger
2008-06-04 9:06 ` Benjamin Herrenschmidt
2008-06-20 13:24 ` [RFC 1/3 v2] hvc_console: rework setup to replace irq functions with callbacks Christian Borntraeger
2008-06-27 5:27 ` Rusty Russell
2008-06-20 13:24 ` [RFC 2/3 v2] virtio_console: use virtqueue notification for hvc_console Christian Borntraeger
2008-06-20 13:24 ` [RFC 3/3 v2] s390: use virtio_console for KVM on s390 Christian Borntraeger
2008-06-23 3:04 ` Rusty Russell
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