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Date:   Fri, 15 Jan 2021 08:09:06 +0800
From:   kernel test robot <>
To:     Masahiro Yamada <>
        Nathan Chancellor <>
Subject: drivers/gpu/drm/i915/i915_sw_fence.c:41:20: error: unused function

Hi Masahiro,

FYI, the error/warning still remains.

tree: master
head:   146620506274bd24d52fb1c589110a30eed8240b
commit: 6863f5643dd717376c2fdc85a47a00f9d738a834 kbuild: allow Clang to find unused static inline functions for W=1 build
date:   1 year, 4 months ago
config: x86_64-randconfig-a014-20210115 (attached as .config)
compiler: clang version 12.0.0 ( 6077d55381a6aa3e947ef7abdc36a7515c598c8a)
reproduce (this is a W=1 build):
        wget -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 remote add linus
        git fetch --no-tags linus master
        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 <>

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/i915_sw_fence.c:41:20: error: unused function 'debug_fence_init_onstack' [-Werror,-Wunused-function]
   static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
   1 error generated.

vim +/debug_fence_init_onstack +41 drivers/gpu/drm/i915/i915_sw_fence.c

fc1584059d6c438b Chris Wilson 2016-11-25  40  
214707fc2ce08d09 Chris Wilson 2017-10-12 @41  static inline void debug_fence_init_onstack(struct i915_sw_fence *fence)
214707fc2ce08d09 Chris Wilson 2017-10-12  42  {
214707fc2ce08d09 Chris Wilson 2017-10-12  43  	debug_object_init_on_stack(fence, &i915_sw_fence_debug_descr);
214707fc2ce08d09 Chris Wilson 2017-10-12  44  }
214707fc2ce08d09 Chris Wilson 2017-10-12  45  

:::::: The code at line 41 was first introduced by commit
:::::: 214707fc2ce08d09982bc4fe4b7a1c1f010e82be drm/i915/selftests: Wrap a timer into a i915_sw_fence

:::::: TO: Chris Wilson <>
:::::: CC: Chris Wilson <>

0-DAY CI Kernel Test Service, Intel Corporation

Download attachment ".config.gz" of type "application/gzip" (29912 bytes)

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