From: Sebastian Andrzej Siewior Date: Thu, 23 Jan 2014 14:45:59 +0100 Subject: [PATCH 053/351] leds: trigger: disable CPU trigger on -RT Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=214376063f567b46e8ebaf5f459ba8f7e1ee5d2f as it triggers: |CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.8-rt10 #141 |[] (unwind_backtrace+0x0/0xf8) from [] (show_stack+0x1c/0x20) |[] (show_stack+0x1c/0x20) from [] (dump_stack+0x20/0x2c) |[] (dump_stack+0x20/0x2c) from [] (__might_sleep+0x13c/0x170) |[] (__might_sleep+0x13c/0x170) from [] (__rt_spin_lock+0x28/0x38) |[] (__rt_spin_lock+0x28/0x38) from [] (rt_read_lock+0x68/0x7c) |[] (rt_read_lock+0x68/0x7c) from [] (led_trigger_event+0x2c/0x5c) |[] (led_trigger_event+0x2c/0x5c) from [] (ledtrig_cpu+0x54/0x5c) |[] (ledtrig_cpu+0x54/0x5c) from [] (arch_cpu_idle_exit+0x18/0x1c) |[] (arch_cpu_idle_exit+0x18/0x1c) from [] (cpu_startup_entry+0xa8/0x234) |[] (cpu_startup_entry+0xa8/0x234) from [] (rest_init+0xb8/0xe0) |[] (rest_init+0xb8/0xe0) from [] (start_kernel+0x2c4/0x380) Signed-off-by: Sebastian Andrzej Siewior --- drivers/leds/trigger/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig index 4018af769969..b4ce8c115949 100644 --- a/drivers/leds/trigger/Kconfig +++ b/drivers/leds/trigger/Kconfig @@ -63,6 +63,7 @@ config LEDS_TRIGGER_BACKLIGHT config LEDS_TRIGGER_CPU bool "LED CPU Trigger" + depends on !PREEMPT_RT_BASE help This allows LEDs to be controlled by active CPUs. This shows the active CPUs across an array of LEDs so you can see which