int drm_setunique (struct inode * inode, struct file * filp, unsigned int cmd, unsigned long arg);
\param inode device inode. \param filp file pointer. \param cmd command. \param arg user argument, pointing to a drm_unique structure. \return zero on success or a negative number on failure.
:unique, and verifies that it matches the device this DRM is attached to (EINVAL otherwise). Deprecated in interface version 1.1 and will return EBUSY when setversion has requested version 1.1 or greater.