| Date | Tue, 13 Jul 2021 17:11:42 +0200 | From | Thomas Gleixner <> | Subject | [patch 48/50] preempt: Adjust PREEMPT_LOCK_OFFSET for RT |
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From: Thomas Gleixner <tglx@linutronix.de>
On PREEMPT_RT regular spinlocks and rwlocks are substituted with rtmutex based constructs. spin/rwlock held regions are preemptible on PREEMPT_RT, so PREEMPT_LOCK_OFFSET has to be 0 to make the various cond_resched_*lock() functions work correctly.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- include/linux/preempt.h | 4 ++++ 1 file changed, 4 insertions(+) --- --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -121,7 +121,11 @@ /* * The preempt_count offset after spin_lock() */ +#if !defined(CONFIG_PREEMPT_RT) #define PREEMPT_LOCK_OFFSET PREEMPT_DISABLE_OFFSET +#else +#define PREEMPT_LOCK_OFFSET 0 +#endif /* * The preempt_count offset needed for things like:
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