Re: [PATCH v4] iio: adc: xilinx-xadc: Push interrupts into hardirq context
From: Sebastian Andrzej Siewior
Date: Wed Aug 12 2015 - 12:33:38 EST
On 08/12/2015 05:17 PM, Lars-Peter Clausen wrote:
> On 08/12/2015 01:00 AM, Xander Huff wrote:
>> Unfortunately, this breaks PREEMPT_RT builds, where a spinlock can sleep,
>> and is thus not able to be acquired from a hardirq handler. This patch gets
>> rid of the threaded handler and pushes all interrupt handling into the
>> hardirq context, and uses request_irq().
>> To validate that this change has no impact on RT performance, here are
>> cyclictest values with no processes running:
> Looks good, thanks.
> Acked-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
Yes, I'm fine with the rework, too.
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