tree: https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel head: b1d08004826c99d8af2be6744a7c623a18965562 commit: 2113cfbdf4f04075dcfe447b93ce56e7fb25b68b [53/60] make VGA_MAP_MEM return pointer config: powerpc64-randconfig-s031-20200607 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.1-247-gcadbd124-dirty git checkout 2113cfbdf4f04075dcfe447b93ce56e7fb25b68b # save the attached .config to linux build tree make W=1 C=1 ARCH=powerpc64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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:1087:25: sparse: got void [noderef] <asn:2> * drivers/video/console/vgacon.c:1090:25: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char *charmap @@ got void [noderef] <asn:2> * @@ drivers/video/console/vgacon.c:1090:25: sparse: expected char *charmap drivers/video/console/vgacon.c:1090:25: sparse: got void [noderef] <asn:2> * arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression 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/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression 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/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression 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/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression 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/io.h:148:1: sparse: sparse: dereference of noderef expression arch/powerpc/include/asm/io.h:148:1: sparse: sparse: dereference of noderef expression vim +532 drivers/video/console/vgacon.c 389 390 static const char *vgacon_startup(void) 391 { 392 const char *display_desc = NULL; 393 phys_addr_t vram_phys; 394 u16 saved1, saved2; 395 volatile u16 *p; 396 397 if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB || 398 screen_info.orig_video_isVGA == VIDEO_TYPE_EFI) { 399 no_vga: 400 #ifdef CONFIG_DUMMY_CONSOLE 401 conswitchp = &dummy_con; 402 return conswitchp->con_startup(); 403 #else 404 return NULL; 405 #endif 406 } 407 408 /* boot_params.screen_info reasonably initialized? */ 409 if ((screen_info.orig_video_lines == 0) || 410 (screen_info.orig_video_cols == 0)) 411 goto no_vga; 412 413 /* VGA16 modes are not handled by VGACON */ 414 if ((screen_info.orig_video_mode == 0x0D) || /* 320x200/4 */ 415 (screen_info.orig_video_mode == 0x0E) || /* 640x200/4 */ 416 (screen_info.orig_video_mode == 0x10) || /* 640x350/4 */ 417 (screen_info.orig_video_mode == 0x12) || /* 640x480/4 */ 418 (screen_info.orig_video_mode == 0x6A)) /* 800x600/4 (VESA) */ 419 goto no_vga; 420 421 vga_video_num_lines = screen_info.orig_video_lines; 422 vga_video_num_columns = screen_info.orig_video_cols; 423 vgastate.vgabase = NULL; 424 425 if (screen_info.orig_video_mode == 7) { 426 /* Monochrome display */ 427 vram_phys = 0xb0000; 428 vga_video_port_reg = VGA_CRT_IM; 429 vga_video_port_val = VGA_CRT_DM; 430 if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { 431 static struct resource ega_console_resource = 432 { .name = "ega", 433 .flags = IORESOURCE_IO, 434 .start = 0x3B0, 435 .end = 0x3BF }; 436 vga_video_type = VIDEO_TYPE_EGAM; 437 vga_vram_size = 0x8000; 438 display_desc = "EGA+"; 439 request_resource(&ioport_resource, 440 &ega_console_resource); 441 } else { 442 static struct resource mda1_console_resource = 443 { .name = "mda", 444 .flags = IORESOURCE_IO, 445 .start = 0x3B0, 446 .end = 0x3BB }; 447 static struct resource mda2_console_resource = 448 { .name = "mda", 449 .flags = IORESOURCE_IO, 450 .start = 0x3BF, 451 .end = 0x3BF }; 452 vga_video_type = VIDEO_TYPE_MDA; 453 vga_vram_size = 0x2000; 454 display_desc = "*MDA"; 455 request_resource(&ioport_resource, 456 &mda1_console_resource); 457 request_resource(&ioport_resource, 458 &mda2_console_resource); 459 vga_video_font_height = 14; 460 } 461 } else { 462 /* If not, it is color. */ 463 vga_can_do_color = true; 464 vram_phys = 0xb8000; 465 vga_video_port_reg = VGA_CRT_IC; 466 vga_video_port_val = VGA_CRT_DC; 467 if ((screen_info.orig_video_ega_bx & 0xff) != 0x10) { 468 int i; 469 470 vga_vram_size = 0x8000; 471 472 if (!screen_info.orig_video_isVGA) { 473 static struct resource ega_console_resource = 474 { .name = "ega", 475 .flags = IORESOURCE_IO, 476 .start = 0x3C0, 477 .end = 0x3DF }; 478 vga_video_type = VIDEO_TYPE_EGAC; 479 display_desc = "EGA"; 480 request_resource(&ioport_resource, 481 &ega_console_resource); 482 } else { 483 static struct resource vga_console_resource = 484 { .name = "vga+", 485 .flags = IORESOURCE_IO, 486 .start = 0x3C0, 487 .end = 0x3DF }; 488 vga_video_type = VIDEO_TYPE_VGAC; 489 display_desc = "VGA+"; 490 request_resource(&ioport_resource, 491 &vga_console_resource); 492 493 /* 494 * Normalise the palette registers, to point 495 * the 16 screen colours to the first 16 496 * DAC entries. 497 */ 498 499 for (i = 0; i < 16; i++) { 500 inb_p(VGA_IS1_RC); 501 outb_p(i, VGA_ATT_W); 502 outb_p(i, VGA_ATT_W); 503 } 504 outb_p(0x20, VGA_ATT_W); 505 506 /* 507 * Now set the DAC registers back to their 508 * default values 509 */ 510 for (i = 0; i < 16; i++) { 511 outb_p(color_table[i], VGA_PEL_IW); 512 outb_p(default_red[i], VGA_PEL_D); 513 outb_p(default_grn[i], VGA_PEL_D); 514 outb_p(default_blu[i], VGA_PEL_D); 515 } 516 } 517 } else { 518 static struct resource cga_console_resource = 519 { .name = "cga", 520 .flags = IORESOURCE_IO, 521 .start = 0x3D4, 522 .end = 0x3D5 }; 523 vga_video_type = VIDEO_TYPE_CGA; 524 vga_vram_size = 0x2000; 525 display_desc = "*CGA"; 526 request_resource(&ioport_resource, 527 &cga_console_resource); 528 vga_video_font_height = 8; 529 } 530 } 531 533 vga_vram_end = (void *)vga_vram_base + vga_vram_size; 534 535 /* 536 * Find out if there is a graphics card present. 537 * Are there smarter methods around? 538 */ 539 p = (volatile u16 *) vga_vram_base; 540 saved1 = scr_readw(p); 541 saved2 = scr_readw(p + 1); 542 scr_writew(0xAA55, p); 543 scr_writew(0x55AA, p + 1); 544 if (scr_readw(p) != 0xAA55 || scr_readw(p + 1) != 0x55AA) { 545 scr_writew(saved1, p); 546 scr_writew(saved2, p + 1); 547 goto no_vga; 548 } 549 scr_writew(0x55AA, p); 550 scr_writew(0xAA55, p + 1); 551 if (scr_readw(p) != 0x55AA || scr_readw(p + 1) != 0xAA55) { 552 scr_writew(saved1, p); 553 scr_writew(saved2, p + 1); 554 goto no_vga; 555 } 556 scr_writew(saved1, p); 557 scr_writew(saved2, p + 1); 558 559 if (vga_video_type == VIDEO_TYPE_EGAC 560 || vga_video_type == VIDEO_TYPE_VGAC 561 || vga_video_type == VIDEO_TYPE_EGAM) { 562 vga_hardscroll_enabled = vga_hardscroll_user_enable; 563 vga_default_font_height = screen_info.orig_video_points; 564 vga_video_font_height = screen_info.orig_video_points; 565 /* This may be suboptimal but is a safe bet - go with it */ 566 vga_scan_lines = 567 vga_video_font_height * vga_video_num_lines; 568 } 569 570 vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH; 571 vgacon_yres = vga_scan_lines; 572 573 if (!vga_init_done) { 574 vgacon_scrollback_startup(); 575 vga_init_done = true; 576 } 577 578 return display_desc; 579 } 580 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org