stm32_mbox
struct stm32_mbox *mb = container_of(work, struct stm32_mbox, vq_work);
struct stm32_mbox *mb = container_of(cl, struct stm32_mbox, client);
static const struct stm32_mbox stm32_rproc_mbox[MBOX_NB_MBX] = {
struct stm32_mbox mb[MBOX_NB_MBX];