Re: [Intel-gfx] [PATCH] drm/i915/fence: Do not use TIMER_IRQSAFE

From: Chris Wilson
Date: Thu Feb 28 2019 - 05:00:32 EST

Quoting Sebastian Andrzej Siewior (2019-02-26 16:00:38)
> On 2019-02-12 17:28:57 [+0100], To linux-kernel@xxxxxxxxxxxxxxx wrote:
> > The timer is initialized with TIMER_IRQSAFE flag. It does look like the
> > timer callback requires this flag at all. Its sole purpose is to ensure
> > synchronisation in the workqueue code.
> >
> > Remove TIMER_IRQSAFE flag because it is not required.
> ping

We call del_timer_sync from irq context, which mandates using
TIMER_IRQSAFE. Failure to do so results in lots of explosions across CI
-- every machine managed to hit the warning.

It may not be the best of api, but it's the only one available for the
driver to use...