[linux-review:UPDATE-20200423-074609/Mika-Kuoppala/drm-i915-Make-define-for-lrc-state-offset/20200423-065449 2/5] drivers/gpu/drm/i915/gt/intel_lrc.c:3251:20: error: unused variable 'batch_start'

[kbuild test robot <lkp@intel.com>]

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tree:   https://github.com/0day-ci/linux/commits/UPDATE-20200423-074609/Mika-Kuoppala/drm-i915-Make-define-for-lrc-state-offset/20200423-065449
head:   c97510eb882a27922ca145ffe61c8ec23e156ee1
commit: e2162e3fc97c1eb42e6ffa2c4e5abe163b8b7ac4 [2/5] drm/i915: Add per ctx batchbuffer wa for timestamp
config: x86_64-randconfig-d001-20200422 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bbf386f02b05db017fda66875cc5edef70779244)
reproduce:
        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 e2162e3fc97c1eb42e6ffa2c4e5abe163b8b7ac4
        # 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: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/gpu/drm/i915/gt/intel_lrc.c:3251:20: error: unused variable 'batch_start' [-Werror,-Wunused-variable]
           const u32 * const batch_start = cs;
                             ^
   1 error generated.

vim +/batch_start +3251 drivers/gpu/drm/i915/gt/intel_lrc.c

  3245	
  3246	static u32 *
  3247	execlists_emit_ctx_bb(struct intel_context *ce,
  3248			      u32 *(*emit)(struct intel_context *, u32 *))
  3249	{
  3250		u32 *cs = context_indirect_bb(ce);
> 3251		const u32 * const batch_start = cs;
  3252	
  3253		cs = emit(ce, cs);
  3254	
  3255		GEM_DEBUG_BUG_ON(cs - batch_start >
  3256				 (I915_GTT_PAGE_SIZE - 4)/sizeof(*cs));
  3257	
  3258		return cs;
  3259	}
  3260	

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

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