drm_irq_busid     585 include/drm/drm.h #define DRM_IOCTL_IRQ_BUSID		DRM_IOWR(0x03, struct drm_irq_busid)
drm_irq_busid     684 include/drm/drm.h typedef struct drm_irq_busid drm_irq_busid_t;