tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel head: 16cbe037318db863224533d996ac2c3837211061 commit: 785d97d45cbc66535b6c595c4614eb961a353e3b [118/123] make VGA_MAP_MEM return pointer config: powerpc-randconfig-s031-20210618 (attached as .config) compiler: powerpc-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git/commi... git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git git fetch --no-tags jirislaby devel git checkout 785d97d45cbc66535b6c595c4614eb961a353e3b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/video/fbdev/vga16fb.c:1324:29: sparse: expected char *screen_buffer drivers/video/fbdev/vga16fb.c:1324:29: sparse: got void [noderef] __iomem * vim +1324 drivers/video/fbdev/vga16fb.c 1302 1303 static int vga16fb_probe(struct platform_device *dev) 1304 { 1305 struct fb_info *info; 1306 struct vga16fb_par *par; 1307 int i; 1308 int ret = 0; 1309 1310 printk(KERN_DEBUG "vga16fb: initializing\n"); 1311 info = framebuffer_alloc(sizeof(struct vga16fb_par), &dev->dev); 1312 1313 if (!info) { 1314 ret = -ENOMEM; 1315 goto err_fb_alloc; 1316 } 1317 info->apertures = alloc_apertures(1); 1318 if (!info->apertures) { 1319 ret = -ENOMEM; 1320 goto err_ioremap; 1321 } 1322 1323 /* XXX share VGA_FB_PHYS and I/O region with vgacon and others */ 1325 1326 if (!info->screen_base) { 1327 printk(KERN_ERR "vga16fb: unable to map device\n"); 1328 ret = -ENOMEM; 1329 goto err_ioremap; 1330 } 1331 1332 printk(KERN_INFO "vga16fb: mapped to 0x%p\n", info->screen_base); 1333 par = info->par; 1334 1335 par->isVGA = screen_info.orig_video_isVGA; 1336 par->palette_blanked = 0; 1337 par->vesa_blanked = 0; 1338 1339 i = par->isVGA? 6 : 2; 1340 1341 vga16fb_defined.red.length = i; 1342 vga16fb_defined.green.length = i; 1343 vga16fb_defined.blue.length = i; 1344 1345 /* name should not depend on EGA/VGA */ 1346 info->fbops = &vga16fb_ops; 1347 info->var = vga16fb_defined; 1348 info->fix = vga16fb_fix; 1349 /* supports rectangles with widths of multiples of 8 */ 1350 info->pixmap.blit_x = 1 << 7 | 1 << 15 | 1 << 23 | 1 << 31; 1351 info->flags = FBINFO_FLAG_DEFAULT | FBINFO_MISC_FIRMWARE | 1352 FBINFO_HWACCEL_YPAN; 1353 1354 i = (info->var.bits_per_pixel == 8) ? 256 : 16; 1355 ret = fb_alloc_cmap(&info->cmap, i, 0); 1356 if (ret) { 1357 printk(KERN_ERR "vga16fb: unable to allocate colormap\n"); 1358 ret = -ENOMEM; 1359 goto err_alloc_cmap; 1360 } 1361 1362 if (vga16fb_check_var(&info->var, info)) { 1363 printk(KERN_ERR "vga16fb: unable to validate variable\n"); 1364 ret = -EINVAL; 1365 goto err_check_var; 1366 } 1367 1368 vga16fb_update_fix(info); 1369 1370 info->apertures->ranges[0].base = VGA_FB_PHYS; 1371 info->apertures->ranges[0].size = VGA_FB_PHYS_LEN; 1372 1373 if (register_framebuffer(info) < 0) { 1374 printk(KERN_ERR "vga16fb: unable to register framebuffer\n"); 1375 ret = -EINVAL; 1376 goto err_check_var; 1377 } 1378 1379 fb_info(info, "%s frame buffer device\n", info->fix.id); 1380 platform_set_drvdata(dev, info); 1381 1382 return 0; 1383 1384 err_check_var: 1385 fb_dealloc_cmap(&info->cmap); 1386 err_alloc_cmap: 1387 iounmap(info->screen_base); 1388 err_ioremap: 1389 framebuffer_release(info); 1390 err_fb_alloc: 1391 return ret; 1392 } 1393 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org