linux-kernel - drivers/gpu/drm/i915/i915_sw_fence.c:84:20: error: unused function 'debug_fence_init

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Message-ID: <202008121332.hEoB4xTw%lkp@intel.com>
Date:   Wed, 12 Aug 2020 13:03:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>
Subject: drivers/gpu/drm/i915/i915_sw_fence.c:84:20: error: unused function
 'debug_fence_init_onstack'

Hi Masahiro,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   fb893de323e2d39f7a1f6df425703a2edbdf56ea
commit: 6863f5643dd717376c2fdc85a47a00f9d738a834 kbuild: allow Clang to find unused static inline functions for W=1 build
date:   11 months ago
config: x86_64-randconfig-a005-20200812 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4f2ad15db535873dda9bfe248a2771023b64a43c)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout 6863f5643dd717376c2fdc85a47a00f9d738a834
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/i915_sw_fence.c:84:20: error: unused function 'debug_fence_init_onstack' [-Werror,-Wunused-function]
   static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
                      ^
>> drivers/gpu/drm/i915/i915_sw_fence.c:105:20: error: unused function 'debug_fence_free' [-Werror,-Wunused-function]
   static inline void debug_fence_free(struct i915_sw_fence *fence)
                      ^
   2 errors generated.
--
>> drivers/gpu/drm/i915/display/intel_hdmi.c:1696:26: error: unused function 'intel_hdmi_hdcp2_protocol' [-Werror,-Wunused-function]
   enum hdcp_wired_protocol intel_hdmi_hdcp2_protocol(void)
                            ^
   1 error generated.
--
>> drivers/gpu/drm/i915/gvt/gtt.c:263:19: error: unused function 'get_pt_type' [-Werror,-Wunused-function]
   static inline int get_pt_type(int type)
                     ^
>> drivers/gpu/drm/i915/gvt/gtt.c:587:20: error: unused function 'ppgtt_set_guest_root_entry' [-Werror,-Wunused-function]
   static inline void ppgtt_set_guest_root_entry(struct intel_vgpu_mm *mm,
                      ^
   2 errors generated.

vim +/debug_fence_init_onstack +84 drivers/gpu/drm/i915/i915_sw_fence.c

fc1584059d6c43 Chris Wilson 2016-11-25   83  
214707fc2ce08d Chris Wilson 2017-10-12  @84  static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
214707fc2ce08d Chris Wilson 2017-10-12   85  {
214707fc2ce08d Chris Wilson 2017-10-12   86  }
214707fc2ce08d Chris Wilson 2017-10-12   87  
fc1584059d6c43 Chris Wilson 2016-11-25   88  static inline void debug_fence_activate(struct i915_sw_fence *fence)
fc1584059d6c43 Chris Wilson 2016-11-25   89  {
fc1584059d6c43 Chris Wilson 2016-11-25   90  }
fc1584059d6c43 Chris Wilson 2016-11-25   91  
fc1584059d6c43 Chris Wilson 2016-11-25   92  static inline void debug_fence_set_state(struct i915_sw_fence *fence,
fc1584059d6c43 Chris Wilson 2016-11-25   93  					 int old, int new)
fc1584059d6c43 Chris Wilson 2016-11-25   94  {
fc1584059d6c43 Chris Wilson 2016-11-25   95  }
fc1584059d6c43 Chris Wilson 2016-11-25   96  
fc1584059d6c43 Chris Wilson 2016-11-25   97  static inline void debug_fence_deactivate(struct i915_sw_fence *fence)
fc1584059d6c43 Chris Wilson 2016-11-25   98  {
fc1584059d6c43 Chris Wilson 2016-11-25   99  }
fc1584059d6c43 Chris Wilson 2016-11-25  100  
fc1584059d6c43 Chris Wilson 2016-11-25  101  static inline void debug_fence_destroy(struct i915_sw_fence *fence)
fc1584059d6c43 Chris Wilson 2016-11-25  102  {
fc1584059d6c43 Chris Wilson 2016-11-25  103  }
fc1584059d6c43 Chris Wilson 2016-11-25  104  
fc1584059d6c43 Chris Wilson 2016-11-25 @105  static inline void debug_fence_free(struct i915_sw_fence *fence)
fc1584059d6c43 Chris Wilson 2016-11-25  106  {
fc1584059d6c43 Chris Wilson 2016-11-25  107  }
fc1584059d6c43 Chris Wilson 2016-11-25  108  

:::::: The code at line 84 was first introduced by commit
:::::: 214707fc2ce08d09982bc4fe4b7a1c1f010e82be drm/i915/selftests: Wrap a timer into a i915_sw_fence

:::::: TO: Chris Wilson <chris@...is-wilson.co.uk>
:::::: CC: Chris Wilson <chris@...is-wilson.co.uk>

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

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