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leds: trigger: disable CPU trigger on -RT 

as it triggers:
|CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.8-rt10 #141
|[<c0014aa4>] (unwind_backtrace+0x0/0xf8) from [<c0012788>] (show_stack+0x1c/0x20)
|[<c0012788>] (show_stack+0x1c/0x20) from [<c043c8dc>] (dump_stack+0x20/0x2c)
|[<c043c8dc>] (dump_stack+0x20/0x2c) from [<c004c5e8>] (__might_sleep+0x13c/0x170)
|[<c004c5e8>] (__might_sleep+0x13c/0x170) from [<c043f270>] (__rt_spin_lock+0x28/0x38)
|[<c043f270>] (__rt_spin_lock+0x28/0x38) from [<c043fa00>] (rt_read_lock+0x68/0x7c)
|[<c043fa00>] (rt_read_lock+0x68/0x7c) from [<c036cf74>] (led_trigger_event+0x2c/0x5c)
|[<c036cf74>] (led_trigger_event+0x2c/0x5c) from [<c036e0bc>] (ledtrig_cpu+0x54/0x5c)
|[<c036e0bc>] (ledtrig_cpu+0x54/0x5c) from [<c000ffd8>] (arch_cpu_idle_exit+0x18/0x1c)
|[<c000ffd8>] (arch_cpu_idle_exit+0x18/0x1c) from [<c00590b8>] (cpu_startup_entry+0xa8/0x234)
|[<c00590b8>] (cpu_startup_entry+0xa8/0x234) from [<c043b2cc>] (rest_init+0xb8/0xe0)
|[<c043b2cc>] (rest_init+0xb8/0xe0) from [<c061ebe0>] (start_kernel+0x2c4/0x380)

Cc: stable-rt@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
This commit is contained in:
Sebastian Andrzej Siewior 2014-01-23 14:45:59 +01:00 committed by Alibek Omarov
parent 322d3dd7f7
commit 16a70d5345
1 changed files with 1 additions and 1 deletions
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2
drivers/leds/trigger/Kconfig
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@ -61,7 +61,7 @@ config LEDS_TRIGGER_BACKLIGHT
config LEDS_TRIGGER_CPU config LEDS_TRIGGER_CPU
bool "LED CPU Trigger" bool "LED CPU Trigger"
depends on LEDS_TRIGGERS depends on LEDS_TRIGGERS && !PREEMPT_RT_BASE
help help
This allows LEDs to be controlled by active CPUs. This shows This allows LEDs to be controlled by active CPUs. This shows
the active CPUs across an array of LEDs so you can see which the active CPUs across an array of LEDs so you can see which