Hi Andrey, [auto build test WARNING on next-20151203] [cannot apply to tip/x86/core kbuild/rc-fixes v4.4-rc3 v4.4-rc2 v4.4-rc1 v4.4-rc3] url: https://github.com/0day-ci/linux/commits/Andrey-Ryabinin/UBSAN-run-time-undefined-behavior-sanity-checker/20151204-202547 config: i386-allmodconfig (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All warnings (new ones prefixed by >>): lib/ubsan.c: In function 'val_to_string': >> lib/ubsan.c:121:8: warning: unused variable 'val' [-Wunused-variable] u_max val = get_unsigned_val(type, value); ^ vim +/val +121 lib/ubsan.c 105 } 106 107 static u_max get_unsigned_val(struct type_descriptor *type, unsigned long val) 108 { 109 if (is_inline_int(type)) 110 return val; 111 112 if (type_bit_width(type) == 64) 113 return *(u64 *)val; 114 115 return *(u_max *)val; 116 } 117 118 static void val_to_string(char *str, size_t size, struct type_descriptor *type, 119 unsigned long value) 120 { > 121 u_max val = get_unsigned_val(type, value); 122 123 if (type_is_int(type)) { 124 if (type_bit_width(type) == 128) { 125 #ifdef CONFIG_ARCH_SUPPORTS_INT128 126 scnprintf(str, size, "0x%08x%08x%08x%08x", 127 (u32)(val >> 96), 128 (u32)(val >> 64), 129 (u32)(val >> 32), --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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