Lines Matching defs:owner

48 	atomic_long_set(&lock->owner, 0);
57 static inline struct task_struct *__owner_task(unsigned long owner)
59 	return (struct task_struct *)(owner & ~MUTEX_FLAGS);
68 static inline unsigned long __owner_flags(unsigned long owner)
70 	return owner & MUTEX_FLAGS;
76 	unsigned long owner = atomic_long_read(&lock->owner);
78 	return (unsigned long)__owner_task(owner);
86 	unsigned long owner, curr = (unsigned long)current;
88 	owner = atomic_long_read(&lock->owner);
90 		unsigned long flags = __owner_flags(owner);
91 		unsigned long task = owner & ~MUTEX_FLAGS;
110 		if (atomic_long_try_cmpxchg_acquire(&lock->owner, &owner, task | flags)) {
117 	return __owner_task(owner);
159 	if (atomic_long_try_cmpxchg_acquire(&lock->owner, &zero, curr))
169 	return atomic_long_try_cmpxchg_release(&lock->owner, &curr, 0UL);
189 	atomic_long_or(flag, &lock->owner);
194 	atomic_long_andnot(flag, &lock->owner);
237 	unsigned long owner = atomic_long_read(&lock->owner);
242 		MUTEX_WARN_ON(__owner_task(owner) != current);
243 		MUTEX_WARN_ON(owner & MUTEX_FLAG_PICKUP);
245 		new = (owner & MUTEX_FLAG_WAITERS);
250 		if (atomic_long_try_cmpxchg_release(&lock->owner, &owner, new))
336 	if (!waiter && (atomic_long_read(&lock->owner) & MUTEX_FLAG_WAITERS))
350  * Look out! "owner" is an entirely speculative pointer access and not
356 bool mutex_spin_on_owner(struct mutex *lock, struct task_struct *owner,
363 	while (__mutex_owner(lock) == owner) {
365 		 * Ensure we emit the owner->on_cpu, dereference _after_
366 		 * checking lock->owner still matches owner. And we already
377 		if (!owner_on_cpu(owner) || need_resched()) {
398 	struct task_struct *owner;
411 	owner = __mutex_owner(lock);
412 	if (owner)
413 		retval = owner_on_cpu(owner);
416 	 * If lock->owner is not set, the mutex has been released. Return true
426  * We try to spin for acquisition when we find that the lock owner
428  * need to reschedule. The rationale is that if the lock owner is
441  * with the spinner at the head of the OSQ, if present, until the owner is
462 		 * MCS (queued) lock first before spinning on the owner field.
469 		struct task_struct *owner;
472 		owner = __mutex_trylock_or_owner(lock);
473 		if (!owner)
477 		 * There's an owner, wait for it to either
480 		if (!mutex_spin_on_owner(lock, owner, ww_ctx, waiter))
602 		 * race and wound us here since they can't have a valid owner
808 	 * race and wound us here, since they can't have a valid owner
935 	unsigned long owner;
944 	 * Except when HANDOFF, in that case we must not clear the owner field,
947 	owner = atomic_long_read(&lock->owner);
949 		MUTEX_WARN_ON(__owner_task(owner) != current);
950 		MUTEX_WARN_ON(owner & MUTEX_FLAG_PICKUP);
952 		if (owner & MUTEX_FLAG_HANDOFF)
955 		if (atomic_long_try_cmpxchg_release(&lock->owner, &owner, __owner_flags(owner))) {
956 			if (owner & MUTEX_FLAG_WAITERS)
978 	if (owner & MUTEX_FLAG_HANDOFF)