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Subjectdrivers/gpu/drm/i915/i915_sw_fence.c:41:20: 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: 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 (https://github.com/llvm/llvm-project 6077d55381a6aa3e947ef7abdc36a7515c598c8a)
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
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6863f5643dd717376c2fdc85a47a00f9d738a834
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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 <lkp@intel.com>

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