48 	atomic_long_set(&lock->owner, 0);  in __mutex_init()
59 static inline struct task_struct *__owner_task(unsigned long owner)  in __owner_task()  argument
61 	return (struct task_struct *)(owner & ~MUTEX_FLAGS);  in __owner_task()
70 static inline unsigned long __owner_flags(unsigned long owner)  in __owner_flags()  argument
72 	return owner & MUTEX_FLAGS;  in __owner_flags()
80 	unsigned long owner, curr = (unsigned long)current;  in __mutex_trylock_common()  local
82 	owner = atomic_long_read(&lock->owner);  in __mutex_trylock_common()
84 		unsigned long flags = __owner_flags(owner);  in __mutex_trylock_common()
85 		unsigned long task = owner & ~MUTEX_FLAGS;  in __mutex_trylock_common()
104 		if (atomic_long_try_cmpxchg_acquire(&lock->owner, &owner, task | flags)) {  in __mutex_trylock_common()
111 	return __owner_task(owner);  in __mutex_trylock_common()
146 	if (atomic_long_try_cmpxchg_acquire(&lock->owner, &zero, curr))  in __mutex_trylock_fast()
156 	return atomic_long_try_cmpxchg_release(&lock->owner, &curr, 0UL);  in __mutex_unlock_fast()
162 	atomic_long_or(flag, &lock->owner);  in __mutex_set_flag()
167 	atomic_long_andnot(flag, &lock->owner);  in __mutex_clear_flag()
208 	unsigned long owner = atomic_long_read(&lock->owner);  in __mutex_handoff()  local
213 		MUTEX_WARN_ON(__owner_task(owner) != current);  in __mutex_handoff()
214 		MUTEX_WARN_ON(owner & MUTEX_FLAG_PICKUP);  in __mutex_handoff()
216 		new = (owner & MUTEX_FLAG_WAITERS);  in __mutex_handoff()
221 		if (atomic_long_try_cmpxchg_release(&lock->owner, &owner, new))  in __mutex_handoff()
307 	if (!waiter && (atomic_long_read(&lock->owner) & MUTEX_FLAG_WAITERS))  in ww_mutex_spin_on_owner()
321  * Look out! "owner" is an entirely speculative pointer access and not
327 bool mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner,  in mutex_spin_on_owner()  argument
334 	while (__mutex_owner(lock) == owner) {  in mutex_spin_on_owner()
336 		 * Ensure we emit the owner->on_cpu, dereference _after_  in mutex_spin_on_owner()
337 		 * checking lock->owner still matches owner. And we already  in mutex_spin_on_owner()
348 		if (!owner_on_cpu(owner) || need_resched()) {  in mutex_spin_on_owner()
369 	struct task_struct *owner;  in mutex_can_spin_on_owner()  local
382 	owner = __mutex_owner(lock);  in mutex_can_spin_on_owner()
383 	if (owner)  in mutex_can_spin_on_owner()
384 		retval = owner_on_cpu(owner);  in mutex_can_spin_on_owner()
387 	 * If lock->owner is not set, the mutex has been released. Return true  in mutex_can_spin_on_owner()
397  * We try to spin for acquisition when we find that the lock owner
399  * need to reschedule. The rationale is that if the lock owner is
412  * with the spinner at the head of the OSQ, if present, until the owner is
433 		 * MCS (queued) lock first before spinning on the owner field.  in mutex_optimistic_spin()
440 		struct task_struct *owner;  in mutex_optimistic_spin()  local
443 		owner = __mutex_trylock_or_owner(lock);  in mutex_optimistic_spin()
444 		if (!owner)  in mutex_optimistic_spin()
448 		 * There's an owner, wait for it to either  in mutex_optimistic_spin()
451 		if (!mutex_spin_on_owner(lock, owner, ww_ctx, waiter))  in mutex_optimistic_spin()
573 		 * race and wound us here since they can't have a valid owner  in __mutex_lock_common()
762 	 * race and wound us here, since they can't have a valid owner  in ww_mutex_trylock()
888 	unsigned long owner;  in __mutex_unlock_slowpath()  local
897 	 * Except when HANDOFF, in that case we must not clear the owner field,  in __mutex_unlock_slowpath()
900 	owner = atomic_long_read(&lock->owner);  in __mutex_unlock_slowpath()
902 		MUTEX_WARN_ON(__owner_task(owner) != current);  in __mutex_unlock_slowpath()
903 		MUTEX_WARN_ON(owner & MUTEX_FLAG_PICKUP);  in __mutex_unlock_slowpath()
905 		if (owner & MUTEX_FLAG_HANDOFF)  in __mutex_unlock_slowpath()
908 		if (atomic_long_try_cmpxchg_release(&lock->owner, &owner, __owner_flags(owner))) {  in __mutex_unlock_slowpath()
909 			if (owner & MUTEX_FLAG_WAITERS)  in __mutex_unlock_slowpath()
930 	if (owner & MUTEX_FLAG_HANDOFF)  in __mutex_unlock_slowpath()