void __lockfunc rt_read_unlock(rwlock_t *rwlock)
{
rwlock_release(&rwlock->dep_map, 1, _RET_IP_);
/* Release the lock only when read_depth is down to 0 */
if (--rwlock->read_depth == 0)
__rt_spin_unlock(&rwlock->lock);
}
void __lockfunc rt_read_unlock(rwlock_t *rwlock)
{
struct rt_mutex *lock = &rwlock->lock;
unsigned long flags;
rwlock_release(&rwlock->dep_map, 1, _RET_IP_);
// TRACE_WARN_ON(lock->save_state != 1);
/*
* Read locks within the self-held write lock succeed.
*/
spin_lock_irqsave(&lock->wait_lock, flags);
if (rt_mutex_real_owner(lock) == current && rwlock->read_depth) {
spin_unlock_irqrestore(&lock->wait_lock, flags);
rwlock->read_depth--;
return;
}
spin_unlock_irqrestore(&lock->wait_lock, flags);
__rt_spin_unlock(&rwlock->lock);
}
void __lockfunc rt_write_unlock(rwlock_t *rwlock)
{
/* NOTE: we always pass in '1' for nested, for simplicity */
rwlock_release(&rwlock->dep_map, 1, _RET_IP_);
__rt_spin_unlock(&rwlock->lock);
}