[kbuild-all] drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:442:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_insert_start'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 1b5044021070efa3259f3e9548dc35d1eb6aa844 commit: 6ac27241106bc946bd50032f4cd96899c6a6fe69 drm/amdgpu: add JPEG v2.0 function supports date: 7 months ago config: s390-randconfig-r004-20200617 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 487ca07fcc75d52755c9fe2ee05bcb3b6eeeec44) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install s390 cross compiling tool for clang build # apt-get install binutils-s390-linux-gnu git checkout 6ac27241106bc946bd50032f4cd96899c6a6fe69 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=s390 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_mode.h:33: In file included from include/drm/drm_crtc.h:31: In file included from include/linux/fb.h:17: In file included from arch/s390/include/asm/io.h:76: include/asm-generic/io.h:492:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:118:21: note: expanded from macro '__swab32' ___constant_swab32(x) : ^ include/uapi/linux/swab.h:19:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x0000ff00UL) << 8) | ^ In file included from drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:57: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_mode.h:33: In file included from include/drm/drm_crtc.h:31: In file included from include/linux/fb.h:17: In file included from arch/s390/include/asm/io.h:76: include/asm-generic/io.h:492:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:118:21: note: expanded from macro '__swab32' ___constant_swab32(x) : ^ include/uapi/linux/swab.h:20:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) | ^ In file included from drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:57: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_mode.h:33: In file included from include/drm/drm_crtc.h:31: In file included from include/linux/fb.h:17: In file included from arch/s390/include/asm/io.h:76: include/asm-generic/io.h:492:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:118:21: note: expanded from macro '__swab32' ___constant_swab32(x) : ^ include/uapi/linux/swab.h:21:12: note: expanded from macro '___constant_swab32' (((__u32)(x) & (__u32)0xff000000UL) >> 24))) ^ In file included from drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:57: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_mode.h:33: In file included from include/drm/drm_crtc.h:31: In file included from include/linux/fb.h:17: In file included from arch/s390/include/asm/io.h:76: include/asm-generic/io.h:492:45: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] val = __le32_to_cpu(__raw_readl(PCI_IOBASE + addr)); ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:34:59: note: expanded from macro '__le32_to_cpu' #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) ^ include/uapi/linux/swab.h:119:12: note: expanded from macro '__swab32' __fswab32(x)) ^ In file included from drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:24: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu.h:57: In file included from drivers/gpu/drm/amd/amdgpu/../amdgpu/amdgpu_mode.h:33: In file included from include/drm/drm_crtc.h:31: In file included from include/linux/fb.h:17: In file included from arch/s390/include/asm/io.h:76: include/asm-generic/io.h:503:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writeb(value, PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:513:46: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writew(cpu_to_le16(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:523:46: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] __raw_writel(cpu_to_le32(value), PCI_IOBASE + addr); ~~~~~~~~~~ ^ include/asm-generic/io.h:585:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:593:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:601:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] readsl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:610:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesb(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:619:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesw(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ include/asm-generic/io.h:628:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] writesl(PCI_IOBASE + addr, buffer, count); ~~~~~~~~~~ ^ void jpeg_v2_0_dec_ring_insert_start(struct amdgpu_ring *ring) ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:442:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_insert_start(struct amdgpu_ring *ring) ^ static void jpeg_v2_0_dec_ring_insert_end(struct amdgpu_ring *ring) ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:460:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_insert_end(struct amdgpu_ring *ring) ^ static void jpeg_v2_0_dec_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq, ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:479:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq, ^ static void jpeg_v2_0_dec_ring_emit_ib(struct amdgpu_ring *ring, ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:528:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_emit_ib(struct amdgpu_ring *ring, ^ static void jpeg_v2_0_dec_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg, ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:579:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg, ^ static void jpeg_v2_0_dec_ring_emit_vm_flush(struct amdgpu_ring *ring, ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:606:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_emit_vm_flush(struct amdgpu_ring *ring, ^ static void jpeg_v2_0_dec_ring_emit_wreg(struct amdgpu_ring *ring, uint32_t reg, uint32_t val) ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:621:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_emit_wreg(struct amdgpu_ring *ring, uint32_t reg, uint32_t val) ^ static void jpeg_v2_0_dec_ring_nop(struct amdgpu_ring *ring, uint32_t count) ^ drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:639:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void jpeg_v2_0_dec_ring_nop(struct amdgpu_ring *ring, uint32_t count) ^ static 28 warnings generated. vim +/jpeg_v2_0_dec_ring_insert_start +442 drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c 434 435 /** 436 * jpeg_v2_0_dec_ring_insert_start - insert a start command 437 * 438 * @ring: amdgpu_ring pointer 439 * 440 * Write a start command to the ring. 441 */ 443 { 444 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_EXTERNAL_REG_INTERNAL_OFFSET, 445 0, 0, PACKETJ_TYPE0)); 446 amdgpu_ring_write(ring, 0x68e04); 447 448 amdgpu_ring_write(ring, PACKETJ(JRBC_DEC_EXTERNAL_REG_WRITE_ADDR, 449 0, 0, PACKETJ_TYPE0)); 450 amdgpu_ring_write(ring, 0x80010000); 451 } 452 453 /** 454 * jpeg_v2_0_dec_ring_insert_end - insert a end command 455 * 456 * @ring: amdgpu_ring pointer 457 * 458 * Write a end command to the ring. 459 */ 461 { 462 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_EXTERNAL_REG_INTERNAL_OFFSET, 463 0, 0, PACKETJ_TYPE0)); 464 amdgpu_ring_write(ring, 0x68e04); 465 466 amdgpu_ring_write(ring, PACKETJ(JRBC_DEC_EXTERNAL_REG_WRITE_ADDR, 467 0, 0, PACKETJ_TYPE0)); 468 amdgpu_ring_write(ring, 0x00010000); 469 } 470 471 /** 472 * jpeg_v2_0_dec_ring_emit_fence - emit an fence & trap command 473 * 474 * @ring: amdgpu_ring pointer 475 * @fence: fence to emit 476 * 477 * Write a fence and a trap command to the ring. 478 */ 480 unsigned flags) 481 { 482 WARN_ON(flags & AMDGPU_FENCE_FLAG_64BIT); 483 484 amdgpu_ring_write(ring, PACKETJ(mmUVD_JPEG_GPCOM_DATA0_INTERNAL_OFFSET, 485 0, 0, PACKETJ_TYPE0)); 486 amdgpu_ring_write(ring, seq); 487 488 amdgpu_ring_write(ring, PACKETJ(mmUVD_JPEG_GPCOM_DATA1_INTERNAL_OFFSET, 489 0, 0, PACKETJ_TYPE0)); 490 amdgpu_ring_write(ring, seq); 491 492 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_RB_MEM_WR_64BIT_BAR_LOW_INTERNAL_OFFSET, 493 0, 0, PACKETJ_TYPE0)); 494 amdgpu_ring_write(ring, lower_32_bits(addr)); 495 496 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_RB_MEM_WR_64BIT_BAR_HIGH_INTERNAL_OFFSET, 497 0, 0, PACKETJ_TYPE0)); 498 amdgpu_ring_write(ring, upper_32_bits(addr)); 499 500 amdgpu_ring_write(ring, PACKETJ(mmUVD_JPEG_GPCOM_CMD_INTERNAL_OFFSET, 501 0, 0, PACKETJ_TYPE0)); 502 amdgpu_ring_write(ring, 0x8); 503 504 amdgpu_ring_write(ring, PACKETJ(mmUVD_JPEG_GPCOM_CMD_INTERNAL_OFFSET, 505 0, PACKETJ_CONDITION_CHECK0, PACKETJ_TYPE4)); 506 amdgpu_ring_write(ring, 0); 507 508 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_EXTERNAL_REG_INTERNAL_OFFSET, 509 0, 0, PACKETJ_TYPE0)); 510 amdgpu_ring_write(ring, 0x3fbc); 511 512 amdgpu_ring_write(ring, PACKETJ(JRBC_DEC_EXTERNAL_REG_WRITE_ADDR, 513 0, 0, PACKETJ_TYPE0)); 514 amdgpu_ring_write(ring, 0x1); 515 516 amdgpu_ring_write(ring, PACKETJ(0, 0, 0, PACKETJ_TYPE7)); 517 amdgpu_ring_write(ring, 0); 518 } 519 520 /** 521 * jpeg_v2_0_dec_ring_emit_ib - execute indirect buffer 522 * 523 * @ring: amdgpu_ring pointer 524 * @ib: indirect buffer to execute 525 * 526 * Write ring commands to execute the indirect buffer. 527 */ 529 struct amdgpu_job *job, 530 struct amdgpu_ib *ib, 531 uint32_t flags) 532 { 533 unsigned vmid = AMDGPU_JOB_GET_VMID(job); 534 535 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_IB_VMID_INTERNAL_OFFSET, 536 0, 0, PACKETJ_TYPE0)); 537 amdgpu_ring_write(ring, (vmid | (vmid << 4))); 538 539 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JPEG_VMID_INTERNAL_OFFSET, 540 0, 0, PACKETJ_TYPE0)); 541 amdgpu_ring_write(ring, (vmid | (vmid << 4))); 542 543 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_IB_64BIT_BAR_LOW_INTERNAL_OFFSET, 544 0, 0, PACKETJ_TYPE0)); 545 amdgpu_ring_write(ring, lower_32_bits(ib->gpu_addr)); 546 547 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_IB_64BIT_BAR_HIGH_INTERNAL_OFFSET, 548 0, 0, PACKETJ_TYPE0)); 549 amdgpu_ring_write(ring, upper_32_bits(ib->gpu_addr)); 550 551 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_IB_SIZE_INTERNAL_OFFSET, 552 0, 0, PACKETJ_TYPE0)); 553 amdgpu_ring_write(ring, ib->length_dw); 554 555 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_RB_MEM_RD_64BIT_BAR_LOW_INTERNAL_OFFSET, 556 0, 0, PACKETJ_TYPE0)); 557 amdgpu_ring_write(ring, lower_32_bits(ring->gpu_addr)); 558 559 amdgpu_ring_write(ring, PACKETJ(mmUVD_LMI_JRBC_RB_MEM_RD_64BIT_BAR_HIGH_INTERNAL_OFFSET, 560 0, 0, PACKETJ_TYPE0)); 561 amdgpu_ring_write(ring, upper_32_bits(ring->gpu_addr)); 562 563 amdgpu_ring_write(ring, PACKETJ(0, 0, PACKETJ_CONDITION_CHECK0, PACKETJ_TYPE2)); 564 amdgpu_ring_write(ring, 0); 565 566 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_RB_COND_RD_TIMER_INTERNAL_OFFSET, 567 0, 0, PACKETJ_TYPE0)); 568 amdgpu_ring_write(ring, 0x01400200); 569 570 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_RB_REF_DATA_INTERNAL_OFFSET, 571 0, 0, PACKETJ_TYPE0)); 572 amdgpu_ring_write(ring, 0x2); 573 574 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_STATUS_INTERNAL_OFFSET, 575 0, PACKETJ_CONDITION_CHECK3, PACKETJ_TYPE3)); 576 amdgpu_ring_write(ring, 0x2); 577 } 578 580 uint32_t val, uint32_t mask) 581 { 582 uint32_t reg_offset = (reg << 2); 583 584 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_RB_COND_RD_TIMER_INTERNAL_OFFSET, 585 0, 0, PACKETJ_TYPE0)); 586 amdgpu_ring_write(ring, 0x01400200); 587 588 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_RB_REF_DATA_INTERNAL_OFFSET, 589 0, 0, PACKETJ_TYPE0)); 590 amdgpu_ring_write(ring, val); 591 592 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_EXTERNAL_REG_INTERNAL_OFFSET, 593 0, 0, PACKETJ_TYPE0)); 594 if (reg_offset >= 0x10000 && reg_offset <= 0x105ff) { 595 amdgpu_ring_write(ring, 0); 596 amdgpu_ring_write(ring, 597 PACKETJ((reg_offset >> 2), 0, 0, PACKETJ_TYPE3)); 598 } else { 599 amdgpu_ring_write(ring, reg_offset); 600 amdgpu_ring_write(ring, PACKETJ(JRBC_DEC_EXTERNAL_REG_WRITE_ADDR, 601 0, 0, PACKETJ_TYPE3)); 602 } 603 amdgpu_ring_write(ring, mask); 604 } 605 607 unsigned vmid, uint64_t pd_addr) 608 { 609 struct amdgpu_vmhub *hub = &ring->adev->vmhub[ring->funcs->vmhub]; 610 uint32_t data0, data1, mask; 611 612 pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr); 613 614 /* wait for register write */ 615 data0 = hub->ctx0_ptb_addr_lo32 + vmid * 2; 616 data1 = lower_32_bits(pd_addr); 617 mask = 0xffffffff; 618 jpeg_v2_0_dec_ring_emit_reg_wait(ring, data0, data1, mask); 619 } 620 622 { 623 uint32_t reg_offset = (reg << 2); 624 625 amdgpu_ring_write(ring, PACKETJ(mmUVD_JRBC_EXTERNAL_REG_INTERNAL_OFFSET, 626 0, 0, PACKETJ_TYPE0)); 627 if (reg_offset >= 0x10000 && reg_offset <= 0x105ff) { 628 amdgpu_ring_write(ring, 0); 629 amdgpu_ring_write(ring, 630 PACKETJ((reg_offset >> 2), 0, 0, PACKETJ_TYPE0)); 631 } else { 632 amdgpu_ring_write(ring, reg_offset); 633 amdgpu_ring_write(ring, PACKETJ(JRBC_DEC_EXTERNAL_REG_WRITE_ADDR, 634 0, 0, PACKETJ_TYPE0)); 635 } 636 amdgpu_ring_write(ring, val); 637 } 638 640 { 641 int i; 642 643 WARN_ON(ring->wptr % 2 || count % 2); 644 645 for (i = 0; i < count / 2; i++) { 646 amdgpu_ring_write(ring, PACKETJ(0, 0, 0, PACKETJ_TYPE6)); 647 amdgpu_ring_write(ring, 0); 648 } 649 } 650 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org