diff --git a/kernel/locking/rtmutex.c b/kernel/locking/rtmutex.c index c13b9b849a4b..35f7685d7460 100644 --- a/kernel/locking/rtmutex.c +++ b/kernel/locking/rtmutex.c @@ -347,6 +347,21 @@ static __always_inline void rt_mutex_adjust_prio(struct task_struct *p) rt_mutex_setprio(p, pi_task); } +/* RT mutex specific wake_q wrappers */ +static __always_inline void rt_mutex_wake_q_add(struct rt_wake_q_head *wqh, + struct rt_mutex_waiter *w) +{ + wake_q_add(&wqh->head, w->task); +} + +static __always_inline void rt_mutex_wake_up_q(struct rt_wake_q_head *wqh) +{ + wake_up_q(&wqh->head); + + /* Pairs with preempt_disable() in mark_wakeup_next_waiter() */ + preempt_enable(); +} + /* * Deadlock detection is conditional: * diff --git a/kernel/locking/rtmutex_common.h b/kernel/locking/rtmutex_common.h index fcc55de46b28..9e2f1dbf6482 100644 --- a/kernel/locking/rtmutex_common.h +++ b/kernel/locking/rtmutex_common.h @@ -39,6 +39,20 @@ struct rt_mutex_waiter { u64 deadline; }; +/** + * rt_wake_q_head - Wrapper around regular wake_q_head to support + * "sleeping" spinlocks on RT + * @head: The regular wake_q_head for sleeping lock variants + */ +struct rt_wake_q_head { + struct wake_q_head head; +}; + +#define DEFINE_RT_WAKE_Q(name) \ + struct rt_wake_q_head name = { \ + .head = WAKE_Q_HEAD_INITIALIZER(name.head), \ + } + /* * PI-futex support (proxy locking functions, etc.): */