tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel head: 9a16900cf327fd84fd1a0807df72dfb7c4900ba8 commit: 7ba80eb5d66879347c2a9a6b32929100aa7c0761 [38/45] make VGA_MAP_MEM return pointer config: powerpc-randconfig-s032-20200916 (attached as .config) compiler: powerpc64-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: v0.6.2-201-g24bdaac6-dirty git checkout 7ba80eb5d66879347c2a9a6b32929100aa7c0761 # 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=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/console/vgacon.c:874:25: sparse: got void [noderef] __iomem * drivers/video/console/vgacon.c:877:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char *charmap @@ got void [noderef] __iomem * @@ drivers/video/console/vgacon.c:877:25: sparse: expected char *charmap drivers/video/console/vgacon.c:877:25: sparse: got void [noderef] __iomem * drivers/video/console/vgacon.c: note: in included file (through include/linux/vt_buffer.h, include/linux/selection.h): arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:34:16: sparse: sparse: cast to restricted __le16 arch/powerpc/include/asm/vga.h:29:15: sparse: sparse: incorrect type in assignment (different base types) @@ expected unsigned short volatile [usertype] @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:29:15: sparse: expected unsigned short volatile [usertype] arch/powerpc/include/asm/vga.h:29:15: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:40:21: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected unsigned short [usertype] v @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:40:21: sparse: expected unsigned short [usertype] v arch/powerpc/include/asm/vga.h:40:21: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:40:21: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected unsigned short [usertype] v @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:40:21: sparse: expected unsigned short [usertype] v arch/powerpc/include/asm/vga.h:40:21: sparse: got restricted __le16 [usertype] arch/powerpc/include/asm/vga.h:40:21: sparse: sparse: incorrect type in argument 2 (different base types) @@ expected unsigned short [usertype] v @@ got restricted __le16 [usertype] @@ arch/powerpc/include/asm/vga.h:40:21: sparse: expected unsigned short [usertype] v arch/powerpc/include/asm/vga.h:40:21: sparse: got restricted __le16 [usertype] # 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 7ba80eb5d66879347c2a9a6b32929100aa7c0761 vim +323 drivers/video/console/vgacon.c 180 181 static const char *vgacon_startup(void) 182 { 183 const char *display_desc = NULL; 184 phys_addr_t vram_phys; 185 u16 saved1, saved2; 186 volatile u16 *p; 187 188 if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB || 189 screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) { 190 no_vga: 191 #ifdef CONFIG_DUMMY_CONSOLE 192 conswitchp = &dummy_con; 193 return conswitchp->con_startup(); 194 #else 195 return NULL; 196 #endif 197 } 198 199 /* boot_params.screen_info reasonably initialized? */ 200 if ((screen_info.orig_video_lines == 0) || 201 (screen_info.orig_video_cols == 0)) 202 goto no_vga; 203 204 /* VGA16 modes are not handled by VGACON */ 205 if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ 206 (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ 207 (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ 208 (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ 209 (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ 210 goto no_vga; 211 212 vga_video_num_lines = screen_info.orig_video_lines; 213 vga_video_num_columns = screen_info.orig_video_cols; 214 vgastate.vgabase = NULL; 215 216 if (screen_info.orig_video_mode == 7) { 217 /* Monochrome display */ 218 vram_phys = 0xb0000; 219 vga_video_port_reg = VGA_CRT_IM; 220 vga_video_port_val = VGA_CRT_DM; 221 if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { 222 static struct resource ega_console_resource = 223 { .name = "ega", 224 .flags = IORESOURCE_IO, 225 .start = 0x3B0, 226 .end = 0x3BF }; 227 vga_video_type = VIDEO_TYPE_EGAM; 228 vga_vram_size = 0x8000; 229 display_desc = "EGA+"; 230 request_resource(&ioport_resource, 231 &ega_console_resource); 232 } else { 233 static struct resource mda1_console_resource = 234 { .name = "mda", 235 .flags = IORESOURCE_IO, 236 .start = 0x3B0, 237 .end = 0x3BB }; 238 static struct resource mda2_console_resource = 239 { .name = "mda", 240 .flags = IORESOURCE_IO, 241 .start = 0x3BF, 242 .end = 0x3BF }; 243 vga_video_type = VIDEO_TYPE_MDA; 244 vga_vram_size = 0x2000; 245 display_desc = "*MDA"; 246 request_resource(&ioport_resource, 247 &mda1_console_resource); 248 request_resource(&ioport_resource, 249 &mda2_console_resource); 250 vga_video_font_height = 14; 251 } 252 } else { 253 /* If not, it is color. */ 254 vga_can_do_color = true; 255 vram_phys = 0xb8000; 256 vga_video_port_reg = VGA_CRT_IC; 257 vga_video_port_val = VGA_CRT_DC; 258 if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { 259 int i; 260 261 vga_vram_size = 0x8000; 262 263 if (!screen_info.orig_video_isVGA) { 264 static struct resource ega_console_resource = 265 { .name = "ega", 266 .flags = IORESOURCE_IO, 267 .start = 0x3C0, 268 .end = 0x3DF }; 269 vga_video_type = VIDEO_TYPE_EGAC; 270 display_desc = "EGA"; 271 request_resource(&ioport_resource, 272 &ega_console_resource); 273 } else { 274 static struct resource vga_console_resource = 275 { .name = "vga+", 276 .flags = IORESOURCE_IO, 277 .start = 0x3C0, 278 .end = 0x3DF }; 279 vga_video_type = VIDEO_TYPE_VGAC; 280 display_desc = "VGA+"; 281 request_resource(&ioport_resource, 282 &vga_console_resource); 283 284 /* 285 * Normalise the palette registers, to point 286 * the 16 screen colours to the first 16 287 * DAC entries. 288 */ 289 290 for (i = 0; i < 16; i++) { 291 inb_p(VGA_IS1_RC); 292 outb_p(i, VGA_ATT_W); 293 outb_p(i, VGA_ATT_W); 294 } 295 outb_p(0x20, VGA_ATT_W); 296 297 /* 298 * Now set the DAC registers back to their 299 * default values 300 */ 301 for (i = 0; i < 16; i++) { 302 outb_p(color_table[i], VGA_PEL_IW); 303 outb_p(default_red[i], VGA_PEL_D); 304 outb_p(default_grn[i], VGA_PEL_D); 305 outb_p(default_blu[i], VGA_PEL_D); 306 } 307 } 308 } else { 309 static struct resource cga_console_resource = 310 { .name = "cga", 311 .flags = IORESOURCE_IO, 312 .start = 0x3D4, 313 .end = 0x3D5 }; 314 vga_video_type = VIDEO_TYPE_CGA; 315 vga_vram_size = 0x2000; 316 display_desc = "*CGA"; 317 request_resource(&ioport_resource, 318 &cga_console_resource); 319 vga_video_font_height = 8; 320 } 321 } 322 324 vga_vram_end = (void *)vga_vram_base + vga_vram_size; 325 326 /* 327 * Find out if there is a graphics card present. 328 * Are there smarter methods around? 329 */ 330 p = (volatile u16 *) vga_vram_base; 331 saved1 = scr_readw(p); 332 saved2 = scr_readw(p + 1); 333 scr_writew(0xAA55, p); 334 scr_writew(0x55AA, p + 1); 335 if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { 336 scr_writew(saved1, p); 337 scr_writew(saved2, p + 1); 338 goto no_vga; 339 } 340 scr_writew(0x55AA, p); 341 scr_writew(0xAA55, p + 1); 342 if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { 343 scr_writew(saved1, p); 344 scr_writew(saved2, p + 1); 345 goto no_vga; 346 } 347 scr_writew(saved1, p); 348 scr_writew(saved2, p + 1); 349 350 if (vga_video_type == VIDEO_TYPE_EGAC 351 || vga_video_type == VIDEO_TYPE_VGAC 352 || vga_video_type == VIDEO_TYPE_EGAM) { 353 vga_hardscroll_enabled = vga_hardscroll_user_enable; 354 vga_default_font_height = screen_info.orig_video_points; 355 vga_video_font_height = screen_info.orig_video_points; 356 /* This may be suboptimal but is a safe bet - go with it */ 357 vga_scan_lines = 358 vga_video_font_height * vga_video_num_lines; 359 } 360 361 vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; 362 vgacon_yres = vga_scan_lines; 363 364 vga_init_done = true; 365 366 return display_desc; 367 } 368 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org