linux-kernel - drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/sienna_cichlid_ppt.c:3827:5: warning: no previous prototype for 'sienna_cichlid_stb_get_data

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Date:   Wed, 12 Jan 2022 22:06:49 +0800
From:   kernel test robot <lkp@...el.com>
To:     Andrey Grodzovsky <andrey.grodzovsky@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Lijo Lazar <lijo.lazar@....com>,
        Luben Tuikov <luben.tuikov@....com>
Subject: drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/sienna_cichlid_ppt.c:3827:5:
 warning: no previous prototype for 'sienna_cichlid_stb_get_data_direct'

Hi Andrey,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   daadb3bd0e8d3e317e36bc2c1542e86c528665e5
commit: db5b5c679e6cad2bb147337af6c378d278231b45 drm/amd/pm: Add STB support in sienna_cichlid
date:   7 weeks ago
config: arc-randconfig-r043-20220112 (https://download.01.org/0day-ci/archive/20220112/202201122225.jnBYBKaM-lkp@intel.com/config)
compiler: arceb-elf-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/torvalds/linux.git/commit/?id=db5b5c679e6cad2bb147337af6c378d278231b45
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout db5b5c679e6cad2bb147337af6c378d278231b45
        # 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=arc SHELL=/bin/bash drivers/gpu/drm/

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

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/sienna_cichlid_ppt.c:3827:5: warning: no previous prototype for 'sienna_cichlid_stb_get_data_direct' [-Wmissing-prototypes]
    3827 | int sienna_cichlid_stb_get_data_direct(struct smu_context *smu,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/sienna_cichlid_stb_get_data_direct +3827 drivers/gpu/drm/amd/amdgpu/../pm/swsmu/smu11/sienna_cichlid_ppt.c

  3826	
> 3827	int sienna_cichlid_stb_get_data_direct(struct smu_context *smu,
  3828					       void *buf,
  3829					       uint32_t size)
  3830	{
  3831		uint32_t *p = buf;
  3832		struct amdgpu_device *adev = smu->adev;
  3833	
  3834		/* No need to disable interrupts for now as we don't lock it yet from ISR */
  3835		spin_lock(&smu->stb_context.lock);
  3836	
  3837		/*
  3838		 * Read the STB FIFO in units of 32bit since this is the accessor window
  3839		 * (register width) we have.
  3840		 */
  3841		buf = ((char *) buf) + size;
  3842		while ((void *)p < buf)
  3843			*p++ = cpu_to_le32(RREG32_PCIE(MP1_Public | smnMP1_PMI_3));
  3844	
  3845		spin_unlock(&smu->stb_context.lock);
  3846	
  3847		return 0;
  3848	}
  3849	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org