drm_block 593 include/drm/drm.h #define DRM_IOCTL_BLOCK DRM_IOWR(0x12, struct drm_block) drm_block 594 include/drm/drm.h #define DRM_IOCTL_UNBLOCK DRM_IOWR(0x13, struct drm_block) drm_block 658 include/drm/drm.h typedef struct drm_block drm_block_t;