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	/*			/*
	* XXX: This sysctl tree must stay at hw.tweX rather than using			* XXX: This sysctl tree must stay at hw.tweX rather than using
	* the device_get_sysctl_tree() created by new-bus because			* the device_get_sysctl_tree() created by new-bus because
	* existing 3rd party binary tools such as tw_cli and 3dm2 use the			* existing 3rd party binary tools such as tw_cli and 3dm2 use the
	* existence of this sysctl node to discover controllers.			* existence of this sysctl node to discover controllers.
	*/			*/
	sysctl_tree = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev),			sysctl_tree = SYSCTL_ADD_NODE(device_get_sysctl_ctx(dev),
	SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,			SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
	device_get_nameunit(dev), CTLFLAG_RD, 0, "");			device_get_nameunit(dev), CTLFLAG_RD \| CTLFLAG_MPSAFE, 0, "");
	if (sysctl_tree == NULL) {			if (sysctl_tree == NULL) {
	twe_printf(sc, "cannot add sysctl tree node\n");			twe_printf(sc, "cannot add sysctl tree node\n");
	return (ENXIO);			return (ENXIO);
	}			}
	SYSCTL_ADD_STRING(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sysctl_tree),			SYSCTL_ADD_STRING(device_get_sysctl_ctx(dev), SYSCTL_CHILDREN(sysctl_tree),
	OID_AUTO, "driver_version", CTLFLAG_RD, TWE_DRIVER_VERSION_STRING, 0,			OID_AUTO, "driver_version", CTLFLAG_RD, TWE_DRIVER_VERSION_STRING, 0,
	"TWE driver version");			"TWE driver version");

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