The following commit has been merged into the irq/core branch of tip: Commit-ID: ba9e6cab49c1465c2c322dcb03d771d5cbecb692 Gitweb: https://git.kernel.org/tip/ba9e6cab49c1465c2c322dcb03d771d5cbecb692 Author: Thomas Gleixner <[email protected]> AuthorDate: Tue, 09 Mar 2021 09:55:58 +01:00 Committer: Thomas Gleixner <[email protected]> CommitterDate: Wed, 17 Mar 2021 16:34:12 +01:00
rcu: Prevent false positive softirq warning on RT Soft interrupt disabled sections can legitimately be preempted or schedule out when blocking on a lock on RT enabled kernels so the RCU preempt check warning has to be disabled for RT kernels. Signed-off-by: Thomas Gleixner <[email protected]> Tested-by: Sebastian Andrzej Siewior <[email protected]> Tested-by: Paul E. McKenney <[email protected]> Reviewed-by: Paul E. McKenney <[email protected]> Reviewed-by: Frederic Weisbecker <[email protected]> Acked-by: Peter Zijlstra (Intel) <[email protected]> Link: https://lore.kernel.org/r/[email protected] --- include/linux/rcupdate.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h index bd04f72..6d855ef 100644 --- a/include/linux/rcupdate.h +++ b/include/linux/rcupdate.h @@ -334,7 +334,8 @@ static inline void rcu_preempt_sleep_check(void) { } #define rcu_sleep_check() \ do { \ rcu_preempt_sleep_check(); \ - RCU_LOCKDEP_WARN(lock_is_held(&rcu_bh_lock_map), \ + if (!IS_ENABLED(CONFIG_PREEMPT_RT)) \ + RCU_LOCKDEP_WARN(lock_is_held(&rcu_bh_lock_map), \ "Illegal context switch in RCU-bh read-side critical section"); \ RCU_LOCKDEP_WARN(lock_is_held(&rcu_sched_lock_map), \ "Illegal context switch in RCU-sched read-side critical section"); \
