[agd5f:drm-next 578/599] drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:26:6: warning: no previous prototype for 'vcn_dec_sw_ring_emit_fence'

[kernel test robot]

tree:   https://gitlab.freedesktop.org/agd5f/linux.git drm-next
head:   3170f5f234272247989fafee4cba4cbbc822631c
commit: 60a2e9eecf1676e3d59f050e5c9688830d7425cc [578/599] drm/amdgpu/vcn: add common vcn sofware ring decode
config: arc-randconfig-r035-20220506 (https://download.01.org/0day-ci/archive/20220507/202205070951.rG9TBWtB-lkp@xxxxxxxxx/config)
compiler: arc-elf-gcc (GCC) 11.3.0
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
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f drm-next
        git checkout 60a2e9eecf1676e3d59f050e5c9688830d7425cc
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=arc SHELL=/bin/bash drivers/gpu/drm/amd/amdgpu/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:26:6: warning: no previous prototype for 'vcn_dec_sw_ring_emit_fence' [-Wmissing-prototypes]
      26 | void vcn_dec_sw_ring_emit_fence(struct amdgpu_ring *ring, u64 addr,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:38:6: warning: no previous prototype for 'vcn_dec_sw_ring_insert_end' [-Wmissing-prototypes]
      38 | void vcn_dec_sw_ring_insert_end(struct amdgpu_ring *ring)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:43:6: warning: no previous prototype for 'vcn_dec_sw_ring_emit_ib' [-Wmissing-prototypes]
      43 | void vcn_dec_sw_ring_emit_ib(struct amdgpu_ring *ring, struct amdgpu_job *job,
         |      ^~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:55:6: warning: no previous prototype for 'vcn_dec_sw_ring_emit_reg_wait' [-Wmissing-prototypes]
      55 | void vcn_dec_sw_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:64:6: warning: no previous prototype for 'vcn_dec_sw_ring_emit_vm_flush' [-Wmissing-prototypes]
      64 | void vcn_dec_sw_ring_emit_vm_flush(struct amdgpu_ring *ring,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c:79:6: warning: no previous prototype for 'vcn_dec_sw_ring_emit_wreg' [-Wmissing-prototypes]
      79 | void vcn_dec_sw_ring_emit_wreg(struct amdgpu_ring *ring, uint32_t reg,
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~


vim +/vcn_dec_sw_ring_emit_fence +26 drivers/gpu/drm/amd/amdgpu/vcn_sw_ring.c

    25	
  > 26	void vcn_dec_sw_ring_emit_fence(struct amdgpu_ring *ring, u64 addr,
    27		u64 seq, uint32_t flags)
    28	{
    29		WARN_ON(flags & AMDGPU_FENCE_FLAG_64BIT);
    30	
    31		amdgpu_ring_write(ring, VCN_DEC_SW_CMD_FENCE);
    32		amdgpu_ring_write(ring, addr);
    33		amdgpu_ring_write(ring, upper_32_bits(addr));
    34		amdgpu_ring_write(ring, seq);
    35		amdgpu_ring_write(ring, VCN_DEC_SW_CMD_TRAP);
    36	}
    37	
  > 38	void vcn_dec_sw_ring_insert_end(struct amdgpu_ring *ring)
    39	{
    40		amdgpu_ring_write(ring, VCN_DEC_SW_CMD_END);
    41	}
    42	
  > 43	void vcn_dec_sw_ring_emit_ib(struct amdgpu_ring *ring, struct amdgpu_job *job,
    44		struct amdgpu_ib *ib, uint32_t flags)
    45	{
    46		uint32_t vmid = AMDGPU_JOB_GET_VMID(job);
    47	
    48		amdgpu_ring_write(ring, VCN_DEC_SW_CMD_IB);
    49		amdgpu_ring_write(ring, vmid);
    50		amdgpu_ring_write(ring, lower_32_bits(ib->gpu_addr));
    51		amdgpu_ring_write(ring, upper_32_bits(ib->gpu_addr));
    52		amdgpu_ring_write(ring, ib->length_dw);
    53	}
    54	
  > 55	void vcn_dec_sw_ring_emit_reg_wait(struct amdgpu_ring *ring, uint32_t reg,
    56		uint32_t val, uint32_t mask)
    57	{
    58		amdgpu_ring_write(ring, VCN_DEC_SW_CMD_REG_WAIT);
    59		amdgpu_ring_write(ring, reg << 2);
    60		amdgpu_ring_write(ring, mask);
    61		amdgpu_ring_write(ring, val);
    62	}
    63	
  > 64	void vcn_dec_sw_ring_emit_vm_flush(struct amdgpu_ring *ring,
    65		uint32_t vmid, uint64_t pd_addr)
    66	{
    67		struct amdgpu_vmhub *hub = &ring->adev->vmhub[ring->funcs->vmhub];
    68		uint32_t data0, data1, mask;
    69	
    70		pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
    71	
    72		/* wait for register write */
    73		data0 = hub->ctx0_ptb_addr_lo32 + vmid * hub->ctx_addr_distance;
    74		data1 = lower_32_bits(pd_addr);
    75		mask = 0xffffffff;
    76		vcn_dec_sw_ring_emit_reg_wait(ring, data0, data1, mask);
    77	}
    78	
  > 79	void vcn_dec_sw_ring_emit_wreg(struct amdgpu_ring *ring, uint32_t reg,

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