version_lock
version_lock = __HYP_SPIN_LOCK_UNLOCKED;
static hyp_spinlock_t version_lock;
hyp_spin_lock(&version_lock);
hyp_spin_unlock(&version_lock);
ret = version_lock(conn, DLM_LOCK_EX,
version_lock(conn, DLM_LOCK_PR, DLM_LKF_CONVERT|DLM_LKF_VALBLK);
ret = version_lock(conn, DLM_LOCK_PR, DLM_LKF_VALBLK);