tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: f6b46ef27317b3441138b902689bd89e4f82c6f4 commit: 55b24f9ce03ee4d6a06b874350c8297ac8135bf5 [5267/5396] mm/early_ioremap: add prototype for early_memremap_pgprot_adjust config: x86_64-randconfig-a012-20210526 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 99155e913e9bad5f7f8a247f8bb3a3ff3da74af1) 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/next/linux-next.git/commit/?id=55b24f9ce03ee4d6a06b874350c8297ac8135bf5 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 55b24f9ce03ee4d6a06b874350c8297ac8135bf5 # 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@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:7: In file included from include/linux/dma-buf.h:16: In file included from include/linux/dma-buf-map.h:9: In file included from include/linux/io.h:13: In file included from arch/x86/include/asm/io.h:44: In file included from ./arch/x86/include/generated/asm/early_ioremap.h:1: In file included from include/asm-generic/early_ioremap.h:6: arch/x86/include/asm/fixmap.h:103:48: error: use of undeclared identifier 'NR_CPUS' FIX_KMAP_END = FIX_KMAP_BEGIN + (KM_MAX_IDX * NR_CPUS) - 1, ^ In file included from drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:11: In file included from drivers/gpu/drm/i915/i915_drv.h:83: In file included from drivers/gpu/drm/i915/gt/intel_gt_types.h:18: In file included from drivers/gpu/drm/i915/gt/uc/intel_uc.h:9: In file included from drivers/gpu/drm/i915/gt/uc/intel_guc.h:17: In file included from drivers/gpu/drm/i915/i915_vma.h:34: >> drivers/gpu/drm/i915/gem/i915_gem_object.h:39:6: error: shift count >= width of type [-Werror,-Wshift-count-overflow] if (overflows_type(size, obj->base.size)) ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/i915_utils.h:125:32: note: expanded from macro 'overflows_type' (sizeof(x) > sizeof(T) && (x) >> BITS_PER_TYPE(T)) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ In file included from drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:11: In file included from drivers/gpu/drm/i915/i915_drv.h:83: In file included from drivers/gpu/drm/i915/gt/intel_gt_types.h:18: In file included from drivers/gpu/drm/i915/gt/uc/intel_uc.h:9: In file included from drivers/gpu/drm/i915/gt/uc/intel_guc.h:17: In file included from drivers/gpu/drm/i915/i915_vma.h:34: >> drivers/gpu/drm/i915/gem/i915_gem_object.h:39:6: error: shift count >= width of type [-Werror,-Wshift-count-overflow] if (overflows_type(size, obj->base.size)) ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/i915_utils.h:125:32: note: expanded from macro 'overflows_type' (sizeof(x) > sizeof(T) && (x) >> BITS_PER_TYPE(T)) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ^~~~ In file included from drivers/gpu/drm/i915/gem/i915_gem_dmabuf.c:11: In file included from drivers/gpu/drm/i915/i915_drv.h:83: In file included from drivers/gpu/drm/i915/gt/intel_gt_types.h:18: In file included from drivers/gpu/drm/i915/gt/uc/intel_uc.h:9: In file included from drivers/gpu/drm/i915/gt/uc/intel_guc.h:17: In file included from drivers/gpu/drm/i915/i915_vma.h:34: >> drivers/gpu/drm/i915/gem/i915_gem_object.h:39:6: error: shift count >= width of type [-Werror,-Wshift-count-overflow] if (overflows_type(size, obj->base.size)) ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/i915_utils.h:125:32: note: expanded from macro 'overflows_type' (sizeof(x) > sizeof(T) && (x) >> BITS_PER_TYPE(T)) ^ include/linux/compiler.h:56:47: note: expanded from macro 'if' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var' #define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond)) ~~~~~~~~~~~~~~~~~^~~~~ include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value' (cond) ? \ ^~~~ 4 errors generated. vim +39 drivers/gpu/drm/i915/gem/i915_gem_object.h f0e4a06397526d Chris Wilson 2019-05-28 18 ae2fb480f32f65 Matthew Auld 2021-01-22 19 /* ae2fb480f32f65 Matthew Auld 2021-01-22 20 * XXX: There is a prevalence of the assumption that we fit the ae2fb480f32f65 Matthew Auld 2021-01-22 21 * object's page count inside a 32bit _signed_ variable. Let's document ae2fb480f32f65 Matthew Auld 2021-01-22 22 * this and catch if we ever need to fix it. In the meantime, if you do ae2fb480f32f65 Matthew Auld 2021-01-22 23 * spot such a local variable, please consider fixing! ae2fb480f32f65 Matthew Auld 2021-01-22 24 * ae2fb480f32f65 Matthew Auld 2021-01-22 25 * Aside from our own locals (for which we have no excuse!): ae2fb480f32f65 Matthew Auld 2021-01-22 26 * - sg_table embeds unsigned int for num_pages ae2fb480f32f65 Matthew Auld 2021-01-22 27 * - get_user_pages*() mixed ints with longs ae2fb480f32f65 Matthew Auld 2021-01-22 28 */ ae2fb480f32f65 Matthew Auld 2021-01-22 29 #define GEM_CHECK_SIZE_OVERFLOW(sz) \ ae2fb480f32f65 Matthew Auld 2021-01-22 30 GEM_WARN_ON((sz) >> PAGE_SHIFT > INT_MAX) ae2fb480f32f65 Matthew Auld 2021-01-22 31 ae2fb480f32f65 Matthew Auld 2021-01-22 32 static inline bool i915_gem_object_size_2big(u64 size) ae2fb480f32f65 Matthew Auld 2021-01-22 33 { ae2fb480f32f65 Matthew Auld 2021-01-22 34 struct drm_i915_gem_object *obj; ae2fb480f32f65 Matthew Auld 2021-01-22 35 ae2fb480f32f65 Matthew Auld 2021-01-22 36 if (GEM_CHECK_SIZE_OVERFLOW(size)) ae2fb480f32f65 Matthew Auld 2021-01-22 37 return true; ae2fb480f32f65 Matthew Auld 2021-01-22 38 ae2fb480f32f65 Matthew Auld 2021-01-22 @39 if (overflows_type(size, obj->base.size)) ae2fb480f32f65 Matthew Auld 2021-01-22 40 return true; ae2fb480f32f65 Matthew Auld 2021-01-22 41 ae2fb480f32f65 Matthew Auld 2021-01-22 42 return false; ae2fb480f32f65 Matthew Auld 2021-01-22 43 } ae2fb480f32f65 Matthew Auld 2021-01-22 44 :::::: The code at line 39 was first introduced by commit :::::: ae2fb480f32f657d896d78b6214c2efebfa61993 drm/i915/gem: consolidate 2big error checking for object sizes :::::: TO: Matthew Auld <matthew.auld@xxxxxxxxx> :::::: CC: Daniel Vetter <daniel.vetter@xxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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