linux-kernel - drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c:109:37: warning: unused variable 'amdgpu_rap_debugfs

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Message-ID: <202106131315.IeToeWXv-lkp@intel.com>
Date:   Sun, 13 Jun 2021 13:14:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Alex Deucher <alexander.deucher@....com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, Dave Airlie <airlied@...hat.com>
Subject: drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c:109:37: warning: unused
 variable 'amdgpu_rap_debugfs_ops'

Hi Dave,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8ecfa36cd4db3275bf3b6c6f32c7e3c6bb537de2
commit: 0c8d22fcae2f9590a07b000e1724f665820b77f7 Merge tag 'amd-drm-next-5.10-2020-09-03' of git://people.freedesktop.org/~agd5f/linux into drm-next
date:   9 months ago
config: powerpc64-randconfig-r025-20210613 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d2012d965d60c3258b3a69d024491698f8aec386)
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 powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0c8d22fcae2f9590a07b000e1724f665820b77f7
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 0c8d22fcae2f9590a07b000e1724f665820b77f7
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 

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 >>):

   In file included from drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c:24:
   In file included from include/linux/debugfs.h:15:
   In file included from include/linux/fs.h:6:
   In file included from include/linux/wait_bit.h:8:
   In file included from include/linux/wait.h:7:
   In file included from include/linux/list.h:9:
   In file included from include/linux/kernel.h:12:
   In file included from include/linux/bitops.h:29:
   In file included from arch/powerpc/include/asm/bitops.h:62:
   arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
   #define __lwsync()      __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
           ^
   <built-in>:309:9: note: previous definition is here
   #define __lwsync __builtin_ppc_lwsync
           ^
>> drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c:109:37: warning: unused variable 'amdgpu_rap_debugfs_ops' [-Wunused-const-variable]
   static const struct file_operations amdgpu_rap_debugfs_ops = {
                                       ^
   2 warnings generated.
--
   In file included from drivers/gpu/drm/amd/amdgpu/../pm/amdgpu_pm.c:26:
   In file included from include/drm/drm_debugfs.h:36:
   In file included from include/linux/seq_file.h:7:
   In file included from include/linux/bug.h:5:
   In file included from arch/powerpc/include/asm/bug.h:109:
   In file included from include/asm-generic/bug.h:20:
   In file included from include/linux/kernel.h:12:
   In file included from include/linux/bitops.h:29:
   In file included from arch/powerpc/include/asm/bitops.h:62:
   arch/powerpc/include/asm/barrier.h:49:9: warning: '__lwsync' macro redefined [-Wmacro-redefined]
   #define __lwsync()      __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
           ^
   <built-in>:309:9: note: previous definition is here
   #define __lwsync __builtin_ppc_lwsync
           ^
>> drivers/gpu/drm/amd/amdgpu/../pm/amdgpu_pm.c:41:34: warning: unused variable 'clocks' [-Wunused-const-variable]
   static const struct cg_flag_name clocks[] = {
                                    ^
   2 warnings generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for HOTPLUG_PCI_POWERNV
   Depends on PCI && HOTPLUG_PCI && PPC_POWERNV && EEH
   Selected by
   - OCXL && PPC_POWERNV && PCI && EEH


vim +/amdgpu_rap_debugfs_ops +109 drivers/gpu/drm/amd/amdgpu/amdgpu_rap.c

a4322e1881bed8 Wenhui Sheng 2020-08-11  108  
a4322e1881bed8 Wenhui Sheng 2020-08-11 @109  static const struct file_operations amdgpu_rap_debugfs_ops = {
a4322e1881bed8 Wenhui Sheng 2020-08-11  110  	.owner = THIS_MODULE,
a4322e1881bed8 Wenhui Sheng 2020-08-11  111  	.read = NULL,
a4322e1881bed8 Wenhui Sheng 2020-08-11  112  	.write = amdgpu_rap_debugfs_write,
a4322e1881bed8 Wenhui Sheng 2020-08-11  113  	.llseek = default_llseek
a4322e1881bed8 Wenhui Sheng 2020-08-11  114  };
a4322e1881bed8 Wenhui Sheng 2020-08-11  115  

:::::: The code at line 109 was first introduced by commit
:::::: a4322e1881bed80ddb904482f0b2e948fa7fd47e drm/amdgpu: add debugfs interface for RAP test

:::::: TO: Wenhui Sheng <Wenhui.Sheng@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>

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

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