[linux-next:master 4335/5418] drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c:37:5: warning: no previous prototype for 'amdgpu_profile_ioctl'

[kernel test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   04fe99a8d936d46a310ca61b8b63dc270962bf01
commit: aeae40911ee65eaebbba9ab6ded0a3da8e7ea8d5 [4335/5418] drm/amdgpu/UAPI: add new PROFILE IOCTL
config: parisc-randconfig-m031-20211207 (https://download.01.org/0day-ci/archive/20211208/202112080344.JKjDO0hY-lkp@xxxxxxxxx/config)
compiler: hppa-linux-gcc (GCC) 11.2.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=aeae40911ee65eaebbba9ab6ded0a3da8e7ea8d5
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout aeae40911ee65eaebbba9ab6ded0a3da8e7ea8d5
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=parisc 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/amdgpu_profile.c:37:5: warning: no previous prototype for 'amdgpu_profile_ioctl' [-Wmissing-prototypes]
      37 | int amdgpu_profile_ioctl(struct drm_device *dev, void *data,
         |     ^~~~~~~~~~~~~~~~~~~~


vim +/amdgpu_profile_ioctl +37 drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c

    26	
    27	/**
    28	 * amdgpu_profile_ioctl - Manages settings for profiling.
    29	 *
    30	 * @dev: drm device pointer
    31	 * @data: drm_amdgpu_vm
    32	 * @filp: drm file pointer
    33	 *
    34	 * Returns:
    35	 * 0 for success, -errno for errors.
    36	 */
  > 37	int amdgpu_profile_ioctl(struct drm_device *dev, void *data,
    38				 struct drm_file *filp)
    39	{
    40		union drm_amdgpu_profile *args = data;
    41		struct amdgpu_device *adev = drm_to_adev(dev);
    42		const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
    43		enum amd_dpm_forced_level current_level, requested_level;
    44		int r;
    45	
    46		if (pp_funcs->get_performance_level)
    47			current_level = amdgpu_dpm_get_performance_level(adev);
    48		else
    49			current_level = adev->pm.dpm.forced_level;
    50	
    51		switch (args->in.op) {
    52		case AMDGPU_PROFILE_OP_GET_STABLE_PSTATE:
    53			if (args->in.flags)
    54				return -EINVAL;
    55			switch (current_level) {
    56			case AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD:
    57				args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_STANDARD;
    58				break;
    59			case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK:
    60				args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_SCLK;
    61				break;
    62			case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK:
    63				args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_MCLK;
    64				break;
    65			case AMD_DPM_FORCED_LEVEL_PROFILE_PEAK:
    66				args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_PEAK;
    67				break;
    68			default:
    69				args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_NONE;
    70				break;
    71			}
    72			break;
    73		case AMDGPU_PROFILE_OP_SET_STABLE_PSTATE:
    74			if (args->in.flags & ~AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MASK)
    75				return -EINVAL;
    76			switch (args->in.flags & AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MASK) {
    77			case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_STANDARD:
    78				requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD;
    79				break;
    80			case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_SCLK:
    81				requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK;
    82				break;
    83			case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_MCLK:
    84				requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK;
    85				break;
    86			case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_PEAK:
    87				requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
    88				break;
    89			case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_NONE:
    90				requested_level = AMD_DPM_FORCED_LEVEL_AUTO;
    91				break;
    92			default:
    93				return -EINVAL;
    94			}
    95	
    96			if ((current_level != requested_level) && pp_funcs->force_performance_level) {
    97				mutex_lock(&adev->pm.mutex);
    98				r = amdgpu_dpm_force_performance_level(adev, requested_level);
    99				if (!r)
   100					adev->pm.dpm.forced_level = requested_level;
   101				mutex_unlock(&adev->pm.mutex);
   102				if (r)
   103					return r;
   104			}
   105			break;
   106		default:
   107			return -EINVAL;
   108		}
   109	
   110		return 0;
   111	}
   112	

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