gve_device_option_modify_ring
struct gve_device_option_modify_ring **dev_op_modify_ring,
const struct gve_device_option_modify_ring *dev_op_modify_ring,
struct gve_device_option_modify_ring *dev_op_modify_ring = NULL;
struct gve_device_option_modify_ring **dev_op_modify_ring,
_Static_assert(sizeof(struct gve_device_option_modify_ring) == 12,