SKD_MUTEX_INITED
if (skdev->flags & SKD_MUTEX_INITED)
skdev->flags |= SKD_MUTEX_INITED;
if (skdev->flags & SKD_MUTEX_INITED) {
if (skdev->flags & SKD_MUTEX_INITED)
skdev->flags &= ~SKD_MUTEX_INITED;