Yet another WARN

[    2.667483] WARNING: CPU: 6 PID: 1 at drivers/iommu/amd_iommu.c:2124 
0xffffffff812cd85a()
[    2.667484] Modules linked in:
[    2.667488] CPU: 6 PID: 1 Comm: swapper/0 Tainted: G U          4.4.2-plx+ #6
[    2.667489] Hardware name: empty empty/S8225, BIOS 'V3.03   ' 11/01/2012
[    2.667490]  ffffffff815efa4c ffffffff8121e0d6 0000000000000000 ffffffff81033fef
[    2.667492]  ffff880422992180 ffff8804230e0098 ffff8804229c0800 ffff880423934000
[    2.667493]  ffff880422a0c000 ffffffff812cd85a ffff880422992180 ffff8804230e0098
[    2.667495] Call Trace:
[    2.667497]  [<ffffffff8121e0d6>] ? 0xffffffff8121e0d6
[    2.667498]  [<ffffffff81033fef>] ? 0xffffffff81033fef
[    2.667499]  [<ffffffff812cd85a>] ? 0xffffffff812cd85a
[    2.667500]  [<ffffffff812cd886>] ? 0xffffffff812cd886
[    2.667500]  [<ffffffff812cd9a7>] ? 0xffffffff812cd9a7
[    2.667501]  [<ffffffff814fa559>] ? 0xffffffff814fa559
[    2.667502]  [<ffffffff812cb3aa>] ? 0xffffffff812cb3aa
[    2.667502]  [<ffffffff812cb9da>] ? 0xffffffff812cb9da
[    2.667503]  [<ffffffff812ceaa3>] ? 0xffffffff812ceaa3
[    2.667504]  [<ffffffff812ca7e8>] ? 0xffffffff812ca7e8
[    2.667504]  [<ffffffff812ca808>] ? 0xffffffff812ca808
[    2.667505]  [<ffffffff81306adf>] ? 0xffffffff81306adf
[    2.667506]  [<ffffffff812cb33a>] ? 0xffffffff812cb33a
[    2.667507]  [<ffffffff8172b08a>] ? 0xffffffff8172b08a
[    2.667507]  [<ffffffff8170c281>] ? 0xffffffff8170c281
[    2.667508]  [<ffffffff8172b1d5>] ? 0xffffffff8172b1d5
[    2.667509]  [<ffffffff8172b250>] ? 0xffffffff8172b250
[    2.667509]  [<ffffffff8170c28f>] ? 0xffffffff8170c28f
[    2.667510]  [<ffffffff810003df>] ? 0xffffffff810003df
[    2.667511]  [<ffffffff81708e04>] ? 0xffffffff81708e04
[    2.667511]  [<ffffffff814f62c8>] ? 0xffffffff814f62c8
[    2.667512]  [<ffffffff814f62cd>] ? 0xffffffff814f62cd
[    2.667513]  [<ffffffff814facef>] ? 0xffffffff814facef
[    2.667513]  [<ffffffff814f62c8>] ? 0xffffffff814f62c8
[    2.667514] ---[ end trace 0000000000000001 ]---




27.02.2016 12:58, Thomas Gleixner пишет:
> On Sat, 27 Feb 2016, Thomas Gleixner wrote:
>> --- a/drivers/iommu/amd_iommu.c
>> +++ b/drivers/iommu/amd_iommu.c
>> @@ -1952,10 +1952,10 @@ static int __attach_device(struct iommu_
>>   	int ret;
>>   
>>   	/*
>> -	 * Must be called with IRQs disabled. Warn here to detect early
>> -	 * when its not.
>> +	 * Must be called with IRQs disabled on a non RT kernel. Warn here to
>> +	 * detect early when its not.
>>   	 */
>> -	WARN_ON(!irqs_disabled());
>> +	WARN_ON_NORT(!irqs_disabled());
> That wants to be
>
> +	WARN_ON_NONRT(!irqs_disabled());
>
> of course.
>
> -ENOTAWAKEYET
>