Hi Matthew, [auto build test ERROR on drm-intel/for-linux-next] [also build test ERROR on next-20170407] [cannot apply to v4.11-rc5] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Matthew-Auld/drm-i915-initial-support-for-huge-gtt-pages-V2/20170406-060958 base: git://anongit.freedesktop.org/drm-intel for-linux-next config: x86_64-randconfig-s0-04090705 (attached as .config) compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): cc1: warnings being treated as errors drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen8_ppgtt_insert_4lvl': >> drivers/gpu/drm/i915/i915_gem_gtt.c:1002: error: 'iter' is used uninitialized in this function drivers/gpu/drm/i915/i915_gem_gtt.c: In function 'gen8_ppgtt_insert_3lvl': drivers/gpu/drm/i915/i915_gem_gtt.c:983: error: 'iter.sg' is used uninitialized in this function drivers/gpu/drm/i915/i915_gem_gtt.c:984: error: 'iter.dma' is used uninitialized in this function vim +/iter +1002 drivers/gpu/drm/i915/i915_gem_gtt.c 894ccebee Chris Wilson 2017-02-15 996 enum i915_cache_level cache_level, 894ccebee Chris Wilson 2017-02-15 997 u32 unused) 894ccebee Chris Wilson 2017-02-15 998 { 894ccebee Chris Wilson 2017-02-15 999 struct i915_hw_ppgtt *ppgtt = i915_vm_to_ppgtt(vm); 894ccebee Chris Wilson 2017-02-15 1000 struct sgt_dma iter = { 894ccebee Chris Wilson 2017-02-15 1001 .sg = pages->sgl, 894ccebee Chris Wilson 2017-02-15 @1002 .dma = sg_dma_address(iter.sg), 894ccebee Chris Wilson 2017-02-15 1003 .max = iter.dma + iter.sg->length, 894ccebee Chris Wilson 2017-02-15 1004 }; 894ccebee Chris Wilson 2017-02-15 1005 struct i915_page_directory_pointer **pdps = ppgtt->pml4.pdps; :::::: The code at line 1002 was first introduced by commit :::::: 894ccebee2b0e606ba9638d20dd87b33568482d7 drm/i915: Micro-optimise gen8_ppgtt_insert_entries() :::::: TO: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> :::::: CC: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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