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The CPU trigger is invoked on ARM from CPU-idle. That trigger later invokes led_trigger_event() which may invoke the callback of the actual driver. That driver can acquire a spinlock_t which is okay on kernel without PREEMPT_RT. On a PREEMPT_RT enabled kernel this lock is turned into a sleeping lock and must not be acquired with disabled interrupts. Disable the CPU trigger on PREEMPT_RT. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Link: https://lkml.kernel.org/r/20210924111501.m57cwwn7ahiyxxdd@linutronix.de Signed-off-by: Pavel Machek <pavel@ucw.cz> |
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Kconfig | ||
ledtrig-activity.c | ||
ledtrig-audio.c | ||
ledtrig-backlight.c | ||
ledtrig-camera.c | ||
ledtrig-cpu.c | ||
ledtrig-default-on.c | ||
ledtrig-disk.c | ||
ledtrig-gpio.c | ||
ledtrig-heartbeat.c | ||
ledtrig-mtd.c | ||
ledtrig-netdev.c | ||
ledtrig-oneshot.c | ||
ledtrig-panic.c | ||
ledtrig-pattern.c | ||
ledtrig-timer.c | ||
ledtrig-transient.c | ||
ledtrig-tty.c | ||
Makefile |