tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d15be546031cf65a0fc34879beca02fd90fe7ac7 commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 5 weeks ago config: m68k-randconfig-s032-20200723 (attached as .config) compiler: m68k-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: v0.6.2-93-g4c6cbe55-dirty git checkout 670d0a4b10704667765f7d18f7592993d02783aa # 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__' ARCH=m68k 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/dnfb.c:243:27: sparse: got unsigned char [usertype] * drivers/video/fbdev/dnfb.c:283:12: sparse: sparse: symbol 'dnfb_init' was not declared. Should it be static? -- drivers/w1/slaves/w1_ds28e04.c:342:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user * @@ got char *buf @@ drivers/w1/slaves/w1_ds28e04.c:342:13: sparse: expected void const volatile [noderef] __user * drivers/w1/slaves/w1_ds28e04.c:342:13: sparse: got char *buf drivers/w1/slaves/w1_ds28e04.c:342:13: sparse: got char *buf drivers/w1/slaves/w1_ds28e04.c:356:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user * @@ got char const *buf @@ drivers/w1/slaves/w1_ds28e04.c:356:13: sparse: expected void const volatile [noderef] __user * drivers/w1/slaves/w1_ds28e04.c:356:13: sparse: got char const *buf drivers/w1/slaves/w1_ds28e04.c:356:13: sparse: got char const *buf vim +/__iomem +159 drivers/video/fbdev/dnfb.c ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 151 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 152 int incr, y_delta, pre_read = 0, x_end, x_word_count; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 153 uint start_mask, end_mask, dest; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 154 ushort *src, dummy; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 155 short i, j; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 156 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 157 incr = (area->dy <= area->sy) ? 1 : -1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 158 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 @159 src = (ushort *)(info->screen_base + area->sy * info->fix.line_length + ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 160 (area->sx >> 4)); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 161 dest = area->dy * (info->fix.line_length >> 1) + (area->dx >> 4); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 162 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 163 if (incr > 0) { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 164 y_delta = (info->fix.line_length * 8) - area->sx - area->width; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 165 x_end = area->dx + area->width - 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 166 x_word_count = (x_end >> 4) - (area->dx >> 4) + 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 167 start_mask = 0xffff0000 >> (area->dx & 0xf); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 168 end_mask = 0x7ffff >> (x_end & 0xf); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 169 out_8(AP_CONTROL_0, ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 170 (((area->dx & 0xf) - (area->sx & 0xf)) % 16) | (0x4 << 5)); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 171 if ((area->dx & 0xf) < (area->sx & 0xf)) ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 172 pre_read = 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 173 } else { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 174 y_delta = -((info->fix.line_length * 8) - area->sx - area->width); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 175 x_end = area->dx - area->width + 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 176 x_word_count = (area->dx >> 4) - (x_end >> 4) + 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 177 start_mask = 0x7ffff >> (area->dx & 0xf); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 178 end_mask = 0xffff0000 >> (x_end & 0xf); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 179 out_8(AP_CONTROL_0, ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 180 ((-((area->sx & 0xf) - (area->dx & 0xf))) % 16) | ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 181 (0x4 << 5)); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 182 if ((area->dx & 0xf) > (area->sx & 0xf)) ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 183 pre_read = 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 184 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 185 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 186 for (i = 0; i < area->height; i++) { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 187 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 188 out_8(AP_CONTROL_3A, 0xc | (dest >> 16)); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 189 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 190 if (pre_read) { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 191 dummy = *src; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 192 src += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 193 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 194 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 195 if (x_word_count) { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 196 out_8(AP_WRITE_ENABLE, start_mask); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 197 *src = dest; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 198 src += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 199 dest += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 200 out_8(AP_WRITE_ENABLE, 0); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 201 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 202 for (j = 1; j < (x_word_count - 1); j++) { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 203 *src = dest; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 204 src += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 205 dest += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 206 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 207 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 208 out_8(AP_WRITE_ENABLE, start_mask); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 209 *src = dest; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 210 dest += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 211 src += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 212 } else { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 213 out_8(AP_WRITE_ENABLE, start_mask | end_mask); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 214 *src = dest; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 215 dest += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 216 src += incr; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 217 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 218 src += (y_delta / 16); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 219 dest += (y_delta / 16); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 220 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 221 out_8(AP_CONTROL_0, NORMAL_MODE); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 222 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 223 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 224 /* ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 225 * Initialization ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 226 */ ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 227 48c68c4f1b54244 drivers/video/dnfb.c Greg Kroah-Hartman 2012-12-21 228 static int dnfb_probe(struct platform_device *dev) ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 229 { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 230 struct fb_info *info; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 231 int err = 0; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 232 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 233 info = framebuffer_alloc(0, &dev->dev); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 234 if (!info) ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 235 return -ENOMEM; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 236 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 237 info->fbops = &dn_fb_ops; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 238 info->fix = dnfb_fix; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 239 info->var = dnfb_var; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 240 info->var.red.length = 1; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 241 info->var.red.offset = 0; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 242 info->var.green = info->var.blue = info->var.red; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 @243 info->screen_base = (u_char *) info->fix.smem_start; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 244 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 245 err = fb_alloc_cmap(&info->cmap, 2, 0); 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 246 if (err < 0) 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 247 goto release_framebuffer; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 248 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 249 err = register_framebuffer(info); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 250 if (err < 0) { ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 251 fb_dealloc_cmap(&info->cmap); 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 252 goto release_framebuffer; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 253 } 3ae5eaec1d2d9c0 drivers/video/dnfb.c Russell King 2005-11-09 254 platform_set_drvdata(dev, info); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 255 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 256 /* now we have registered we can safely setup the hardware */ ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 257 out_8(AP_CONTROL_3A, RESET_CREG); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 258 out_be16(AP_WRITE_ENABLE, 0x0); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 259 out_8(AP_CONTROL_0, NORMAL_MODE); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 260 out_8(AP_CONTROL_1, (AD_BLT | DST_EQ_SRC | NORM_CREG1)); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 261 out_8(AP_CONTROL_2, S_DATA_PLN); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 262 out_be16(AP_ROP_1, SWAP(0x3)); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 263 ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 264 printk("apollo frame buffer alive and kicking !\n"); ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 265 return err; 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 266 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 267 release_framebuffer: 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 268 framebuffer_release(info); 6b04e9f2564a609 drivers/video/fbdev/dnfb.c Markus Elfring 2017-11-09 269 return err; ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 270 } ^1da177e4c3f415 drivers/video/dnfb.c Linus Torvalds 2005-04-16 271 :::::: The code at line 159 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org