linux-kernel - [agd5f:drm-next 73/91] drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2460:5: warning: no previous prototype for function 'amdgpu_ras_block_late_init

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Message-ID: <202202181417.bZQAVKEY-lkp@intel.com>
Date:   Fri, 18 Feb 2022 14:31:27 +0800
From:   kernel test robot <lkp@...el.com>
To:     yipechai <YiPeng.Chai@....com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>,
        Tao Zhou <tao.zhou1@....com>
Subject: [agd5f:drm-next 73/91]
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2460:5: warning: no previous
 prototype for function 'amdgpu_ras_block_late_init_default'

tree:   https://gitlab.freedesktop.org/agd5f/linux.git drm-next
head:   7dfbe38cecadbaf6dd426855d8bf8f34a4ca2c30
commit: 418abce203fc2e936bf8c7632a9a429e861f6283 [73/91] drm/amdgpu: Remove redundant .ras_late_init initialization in some ras blocks
config: arm-randconfig-r036-20220217 (https://download.01.org/0day-ci/archive/20220218/202202181417.bZQAVKEY-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        git remote add agd5f https://gitlab.freedesktop.org/agd5f/linux.git
        git fetch --no-tags agd5f drm-next
        git checkout 418abce203fc2e936bf8c7632a9a429e861f6283
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm 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@...el.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2416:3: warning: variable 'ras_obj' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]
                   if (adev->in_suspend || amdgpu_in_reset(adev)) {
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:56:28: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:58:30: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2453:6: note: uninitialized use occurs here
           if (ras_obj->ras_cb)
               ^~~~~~~
   include/linux/compiler.h:56:47: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                                                 ^~~~
   include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
   #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
                                                      ^~~~
   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2416:3: note: remove the 'if' if its condition is always false
                   if (adev->in_suspend || amdgpu_in_reset(adev)) {
                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler.h:56:23: note: expanded from macro 'if'
   #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
                         ^
   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2403:41: note: initialize the variable 'ras_obj' to silence this warning
           struct amdgpu_ras_block_object *ras_obj;
                                                  ^
                                                   = NULL
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2460:5: warning: no previous prototype for function 'amdgpu_ras_block_late_init_default' [-Wmissing-prototypes]
   int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
       ^
   drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c:2460:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
   ^
   static 
   2 warnings generated.


vim +/amdgpu_ras_block_late_init_default +2460 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c

  2459	
> 2460	int amdgpu_ras_block_late_init_default(struct amdgpu_device *adev,
  2461				 struct ras_common_if *ras_block)
  2462	{
  2463		return amdgpu_ras_block_late_init(adev, ras_block);
  2464	}
  2465	

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