hammer_lock_sh
void hammer_lock_sh(struct hammer_lock *lock);
hammer_lock_sh(&parent->lock);
hammer_lock_sh(&ip->lock);
hammer_lock_sh(&node->lock);
hammer_lock_sh(&node->lock);
hammer_lock_sh(&node->lock);
hammer_lock_sh(&node->lock);
hammer_lock_sh(&node->lock);
hammer_lock_sh(&tmp_node->lock);
hammer_lock_sh(&trans->hmp->sync_lock);
hammer_lock_sh(&ip->lock);
hammer_lock_sh(&cursor.ip->lock);