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genirq/timings: Add selftest for circular array

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Due to the complexity of the code and the difficulty to debug it, add some
selftests to the framework in order to spot issues or regression at boot
time when the runtime testing is enabled for this subsystem.

This tests the circular buffer at the limits and validates:
 - the encoding / decoding of the values
 - the macro to browse the irq timings circular buffer
 - the function to push data in the circular buffer

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: andriy.shevchenko@linux.intel.com
Link: https://lkml.kernel.org/r/20190527205521.12091-7-daniel.lezcano@linaro.org
This commit is contained in:
Daniel Lezcano
2019-05-27 22:55:19 +02:00
committed by Thomas Gleixner
parent 23aa3b9a6b
commit 6aed82de71
3 changed files with 130 additions and 0 deletions
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8
lib/Kconfig.debug
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@@ -1858,6 +1858,14 @@ config TEST_PARMAN
If unsure, say N.
config TEST_IRQ_TIMINGS
bool "IRQ timings selftest"
depends on IRQ_TIMINGS
help
Enable this option to test the irq timings code on boot.
If unsure, say N.
config TEST_LKM
tristate "Test module loading with 'hello world' module"
depends on m