vmw_cmdbuf_dheader
sizeof(struct vmw_cmdbuf_dheader),
struct vmw_cmdbuf_dheader *dheader;
dheader = container_of(header->cb_header, struct vmw_cmdbuf_dheader,
struct vmw_cmdbuf_dheader *dheader;
(u64)offsetof(struct vmw_cmdbuf_dheader, cmd);