Hi Jani, I love your patch! Yet something to improve: [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on v5.4 next-20191129] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Jani-Nikula/video-drm-etc-consti... base: git://anongit.freedesktop.org/drm-intel for-linux-next config: ia64-allmodconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 7.4.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=7.4.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/video/fbdev/uvesafb.c: In function 'uvesafb_init_info': info->fbops->fb_blank = NULL; ^ drivers/video/fbdev/uvesafb.c:1513:31: error: assignment of member 'fb_pan_display' in read-only object info->fbops->fb_pan_display = NULL; ^ -- drivers/video/fbdev/aty/atyfb_base.c: In function 'atyfb_set_par': info->fbops->fb_sync = atyfb_sync; ^ drivers/video/fbdev/aty/atyfb_base.c:1322:24: error: assignment of member 'fb_sync' in read-only object info->fbops->fb_sync = NULL; ^ -- drivers/video/fbdev/mb862xx/mb862xxfb_accel.c: In function 'mb862xxfb_init_accel': info->fbops->fb_fillrect = cfb_fillrect; ^ info->fbops->fb_copyarea = cfb_copyarea; ^ info->fbops->fb_imageblit = cfb_imageblit; ^ drivers/video/fbdev/mb862xx/mb862xxfb_accel.c:316:28: error: assignment of member 'fb_fillrect' in read-only object info->fbops->fb_fillrect = mb86290fb_fillrect; ^ drivers/video/fbdev/mb862xx/mb862xxfb_accel.c:317:28: error: assignment of member 'fb_copyarea' in read-only object info->fbops->fb_copyarea = mb86290fb_copyarea; ^ drivers/video/fbdev/mb862xx/mb862xxfb_accel.c:318:29: error: assignment of member 'fb_imageblit' in read-only object info->fbops->fb_imageblit = mb86290fb_imageblit; ^ -- drivers/video/fbdev/nvidia/nvidia.c: In function 'nvidiafb_set_par': info->fbops->fb_imageblit = nvidiafb_imageblit; ^ info->fbops->fb_fillrect = nvidiafb_fillrect; ^ drivers/video/fbdev/nvidia/nvidia.c:665:28: error: assignment of member 'fb_copyarea' in read-only object info->fbops->fb_copyarea = nvidiafb_copyarea; ^ drivers/video/fbdev/nvidia/nvidia.c:666:24: error: assignment of member 'fb_sync' in read-only object info->fbops->fb_sync = nvidiafb_sync; ^ drivers/video/fbdev/nvidia/nvidia.c:672:29: error: assignment of member 'fb_imageblit' in read-only object info->fbops->fb_imageblit = cfb_imageblit; ^ drivers/video/fbdev/nvidia/nvidia.c:673:28: error: assignment of member 'fb_fillrect' in read-only object info->fbops->fb_fillrect = cfb_fillrect; ^ drivers/video/fbdev/nvidia/nvidia.c:674:28: error: assignment of member 'fb_copyarea' in read-only object info->fbops->fb_copyarea = cfb_copyarea; ^ drivers/video/fbdev/nvidia/nvidia.c:675:24: error: assignment of member 'fb_sync' in read-only object info->fbops->fb_sync = NULL; ^ drivers/video/fbdev/nvidia/nvidia.c: In function 'nvidia_set_fbinfo': drivers/video/fbdev/nvidia/nvidia.c:1168:29: error: assignment of member 'fb_cursor' in read-only object info->fbops->fb_cursor = NULL; ^ vim +/fb_blank +1443 drivers/video/fbdev/uvesafb.c 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1427 48c68c4f1b5424 drivers/video/uvesafb.c Greg Kroah-Hartman 2012-12-21 1428 static void uvesafb_init_info(struct fb_info *info, struct vbe_mode_ib *mode) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1429 { 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1430 unsigned int size_vmode; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1431 unsigned int size_remap; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1432 unsigned int size_total; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1433 struct uvesafb_par *par = info->par; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1434 int i, h; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1435 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1436 info->pseudo_palette = ((u8 *)info->par + sizeof(struct uvesafb_par)); 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1437 info->fix = uvesafb_fix; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1438 info->fix.ypanstep = par->ypan ? 1 : 0; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1439 info->fix.ywrapstep = (par->ypan > 1) ? 1 : 0; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1440 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1441 /* Disable blanking if the user requested so. */ 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1442 if (!blank) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 @1443 info->fbops->fb_blank = NULL; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1444 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1445 /* 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1446 * Find out how much IO memory is required for the mode with 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1447 * the highest resolution. 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1448 */ 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1449 size_remap = 0; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1450 for (i = 0; i < par->vbe_modes_cnt; i++) { 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1451 h = par->vbe_modes[i].bytes_per_scan_line * 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1452 par->vbe_modes[i].y_res; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1453 if (h > size_remap) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1454 size_remap = h; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1455 } 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1456 size_remap *= 2; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1457 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1458 /* 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1459 * size_vmode -- that is the amount of memory needed for the 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1460 * used video mode, i.e. the minimum amount of 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1461 * memory we need. 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1462 */ 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1463 size_vmode = info->var.yres * mode->bytes_per_scan_line; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1464 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1465 /* 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1466 * size_total -- all video memory we have. Used for mtrr 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1467 * entries, resource allocation and bounds 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1468 * checking. 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1469 */ 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1470 size_total = par->vbe_ib.total_memory * 65536; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1471 if (vram_total) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1472 size_total = vram_total * 1024 * 1024; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1473 if (size_total < size_vmode) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1474 size_total = size_vmode; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1475 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1476 /* 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1477 * size_remap -- the amount of video memory we are going to 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1478 * use for vesafb. With modern cards it is no 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1479 * option to simply use size_total as th 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1480 * wastes plenty of kernel address space. 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1481 */ 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1482 if (vram_remap) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1483 size_remap = vram_remap * 1024 * 1024; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1484 if (size_remap < size_vmode) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1485 size_remap = size_vmode; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1486 if (size_remap > size_total) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1487 size_remap = size_total; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1488 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1489 info->fix.smem_len = size_remap; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1490 info->fix.smem_start = mode->phys_base_ptr; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1491 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1492 /* 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1493 * We have to set yres_virtual here because when setup_var() was 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1494 * called, smem_len wasn't defined yet. 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1495 */ 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1496 info->var.yres_virtual = info->fix.smem_len / 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1497 mode->bytes_per_scan_line; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1498 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1499 if (par->ypan && info->var.yres_virtual > info->var.yres) { a8feae09110675 drivers/video/fbdev/uvesafb.c Joe Perches 2017-06-14 1500 pr_info("scrolling: %s using protected mode interface, yres_virtual=%d\n", 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1501 (par->ypan > 1) ? "ywrap" : "ypan", 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1502 info->var.yres_virtual); 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1503 } else { a8feae09110675 drivers/video/fbdev/uvesafb.c Joe Perches 2017-06-14 1504 pr_info("scrolling: redraw\n"); 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1505 info->var.yres_virtual = info->var.yres; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1506 par->ypan = 0; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1507 } 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1508 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1509 info->flags = FBINFO_FLAG_DEFAULT | 1cc9fb6dbf915e drivers/video/uvesafb.c Roel Kluin 2009-03-31 1510 (par->ypan ? FBINFO_HWACCEL_YPAN : 0); 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1511 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1512 if (!par->ypan) 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1513 info->fbops->fb_pan_display = NULL; 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1514 } 8bdb3a2d7df48b drivers/video/uvesafb.c Michal Januszewski 2007-10-16 1515 :::::: The code at line 1443 was first introduced by commit :::::: 8bdb3a2d7df48b861972c4bfb58490853a228f51 uvesafb: the driver core :::::: TO: Michal Januszewski <spock(a)gentoo.org&gt; :::::: CC: Linus Torvalds <torvalds(a)woody.linux-foundation.org&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation