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kernel_optimize_test/drivers/iio/trigger
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Lars-Peter Clausen b113f3bf16 iio: hrtimer-trigger: Mark hrtimer to expire in hard interrupt context 
[ Upstream commit 0178297c1e6898e2197fe169ef3be723e019b971 ]

On PREEMPT_RT enabled kernels unmarked hrtimers are moved into soft
interrupt expiry mode by default.

The IIO hrtimer-trigger needs to run in hard interrupt context since it
will end up calling generic_handle_irq() which has the requirement to run
in hard interrupt context.

Explicitly specify that the timer needs to run in hard interrupt context by
using the HRTIMER_MODE_REL_HARD flag.

Fixes: f5c2f0215e ("hrtimer: Move unmarked hrtimers to soft interrupt expiry on RT")
Reported-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lore.kernel.org/r/20201117103751.16131-1-lars@metafoo.de
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2020-12-30 11:53:33 +01:00
..
iio-trig-hrtimer.c iio: hrtimer-trigger: Mark hrtimer to expire in hard interrupt context 2020-12-30 11:53:33 +01:00
iio-trig-interrupt.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
iio-trig-loop.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 177 2019-05-30 11:29:19 -07:00
iio-trig-sysfs.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 177 2019-05-30 11:29:19 -07:00
Kconfig treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stm32-lptimer-trigger.c iio: stm32: Adopt SPDX identifier 2018-01-08 16:03:41 +01:00
stm32-timer-trigger.c iio: Remove superfluous of_node assignments 2020-06-14 14:20:08 +01:00