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| author | Sebastian Andrzej Siewior <[email protected]> | 2021-10-13 09:37:19 +0000 |
|---|---|---|
| committer | Pavel Machek <[email protected]> | 2021-10-13 18:07:57 +0000 |
| commit | 97b31c1f8eb865bc3aa5f4a08286a6406d782ea8 (patch) | |
| tree | 8e091f2c560334b4b176b133c4fdea5c443b90dd /scripts/gcc-plugins/gcc-generate-rtl-pass.h | |
| parent | leds: trigger: use RCU to protect the led_cdevs list (diff) | |
| download | kernel-97b31c1f8eb865bc3aa5f4a08286a6406d782ea8.tar.gz kernel-97b31c1f8eb865bc3aa5f4a08286a6406d782ea8.zip | |
leds: trigger: Disable CPU trigger on PREEMPT_RT
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 <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Pavel Machek <[email protected]>
Diffstat (limited to 'scripts/gcc-plugins/gcc-generate-rtl-pass.h')
0 files changed, 0 insertions, 0 deletions