/** * ttm_bo_io * * @bdev: Pointer to the struct ttm_bo_device. * @filp: Pointer to the struct file attempting to read / write. * @wbuf: User-space pointer to address of buffer to write. NULL on read. * @rbuf: User-space pointer to address of buffer to read into. * Null on write. * @count: Number of bytes to read / write. * @f_pos: Pointer to current file position. * @write: 1 for read, 0 for write. * * This function implements read / write into ttm buffer objects, and is * intended to * be called from the fops::read and fops::write method. * Returns: * See man (2) write, man(2) read. In particular, * the function may return -ERESTARTSYS if * interrupted by a signal. */