linux-kernel - Re: [ANNOUNCE] 4.0.4-rt1

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Date:	Tue, 26 May 2015 12:41:52 -0700
From:	Fernando Lopez-Lezcano <nando@...ma.Stanford.EDU>
To:	Clark Williams <williams@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
CC:	nando@...ma.Stanford.EDU,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Kacur <jkacur@...hat.com>
Subject: Re: [ANNOUNCE] 4.0.4-rt1

On 05/26/2015 08:43 AM, Clark Williams wrote:
> On Tue, 26 May 2015 11:19:24 -0400
> Steven Rostedt <rostedt@...dmis.org> wrote:
>
>> On Tue, 26 May 2015 08:48:02 -0500
>> Clark Williams <williams@...hat.com> wrote:
>>
>>
>>> Change the WARN_ON to WARN_ON_NORT
>>
>> Do we have a WARN_ON_NORT? I see a WARN_ON_NONRT, but not a
>> WARN_ON_NORT. Does this compile?
>>
>> -- Steve
>
> Sigh. Of course not. Reupdated patch (and yes this one compiles):

Thanks! Seems to have fixed the problem (of course!)
So far so good and nothing weird in the output of dmesg....
-- Fernando



> From: Clark Williams <williams@...hat.com>
> Date: Thu, 21 May 2015 12:51:53 -0500
> Subject: [PATCH] [rt] i915: bogus warning from i915 when running on PREEMPT_RT
>
> The i915 driver has a 'WARN_ON(!in_interrupt())' in the display
> handler, which whines constanly on the RT kernel (since the interrupt
> is actually handled in a threaded handler and not actual interrupt
> context).
>
> Change the WARN_ON to WARN_ON_NORT
>
> Signed-off-by: Clark Williams <williams@...hat.com>
> ---
>   drivers/gpu/drm/i915/intel_display.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index f75173c20f47..30b1d16caa0d 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -9745,7 +9745,7 @@ void intel_check_page_flip(struct drm_device *dev, int pipe)
>   	struct drm_crtc *crtc = dev_priv->pipe_to_crtc_mapping[pipe];
>   	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>
> -	WARN_ON(!in_interrupt());
> +	WARN_ON_NONRT(!in_interrupt());
>
>   	if (crtc == NULL)
>   		return;
>

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