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

From: kernel test robot
Date: Wed Jun 17 2020 - 22:46:15 EST

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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@xxxxxxxxx>

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);
~~~~~~~~~~ ^
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:442:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_insert_start' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:460:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_insert_end' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:479:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_emit_fence' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:528:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_emit_ib' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:579:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_emit_reg_wait' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:606:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_emit_vm_flush' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:621:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_emit_wreg' [-Wmissing-prototypes]
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
>> drivers/gpu/drm/amd/amdgpu/jpeg_v2_0.c:639:6: warning: no previous prototype for function 'jpeg_v2_0_dec_ring_nop' [-Wmissing-prototypes]
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 */
> 442 void jpeg_v2_0_dec_ring_insert_start(struct amdgpu_ring *ring)
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 */
> 460 void jpeg_v2_0_dec_ring_insert_end(struct amdgpu_ring *ring)
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 */
> 479 void jpeg_v2_0_dec_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
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 */
> 528 void jpeg_v2_0_dec_ring_emit_ib(struct amdgpu_ring *ring,
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
> 579 void jpeg_v2_0_dec_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
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
> 606 void jpeg_v2_0_dec_ring_emit_vm_flush(struct amdgpu_ring *ring,
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
> 621 void jpeg_v2_0_dec_ring_emit_wreg(struct amdgpu_ring *ring, uint32_t reg, uint32_t val)
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
> 639 void jpeg_v2_0_dec_ring_nop(struct amdgpu_ring *ring, uint32_t count)
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

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