tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: c11d28ab4a691736e30b49813fb801847bd44e83 commit: ac0a95a3ea7811f5cc4489924ddb54f0ea0f3007 [10235/12102] phy: intel: Add driver support for ComboPhy config: h8300-randconfig-r002-20200524 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.3.0 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 git checkout ac0a95a3ea7811f5cc4489924ddb54f0ea0f3007 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/build_bug.h:5, from include/linux/bitfield.h:10, from drivers/phy/intel/phy-intel-combo.c:8: drivers/phy/intel/phy-intel-combo.c: In function 'combo_phy_w32_off_mask': include/linux/bitfield.h:52:28: warning: comparison is always false due to limited range of data type [-Wtype-limits] 52 | BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, | ^ include/linux/compiler.h:330:9: note: in definition of macro '__compiletime_assert' 330 | if (!(condition)) | ^~~~~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:52:3: note: in expansion of macro 'BUILD_BUG_ON_MSG' 52 | BUILD_BUG_ON_MSG((_mask) > (typeof(_reg))~0ull, | ^~~~~~~~~~~~~~~~ include/linux/bitfield.h:94:3: note: in expansion of macro '__BF_FIELD_CHECK' 94 | __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); | ^~~~~~~~~~~~~~~~ drivers/phy/intel/phy-intel-combo.c:137:13: note: in expansion of macro 'FIELD_PREP' 137 | reg_val |= FIELD_PREP(mask, val); | ^~~~~~~~~~ 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert' 331 | prefix ## suffix(); | ^~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:46:3: note: in expansion of macro 'BUILD_BUG_ON_MSG' 46 | BUILD_BUG_ON_MSG(!__builtin_constant_p(_mask), | ^~~~~~~~~~~~~~~~ include/linux/bitfield.h:94:3: note: in expansion of macro '__BF_FIELD_CHECK' 94 | __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); | ^~~~~~~~~~~~~~~~ drivers/phy/intel/phy-intel-combo.c:137:13: note: in expansion of macro 'FIELD_PREP' 137 | reg_val |= FIELD_PREP(mask, val); | ^~~~~~~~~~ 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert' 331 | prefix ## suffix(); | ^~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' 50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) | ^~~~~~~~~~~~~~~~ include/linux/build_bug.h:21:2: note: in expansion of macro 'BUILD_BUG_ON' 21 | BUILD_BUG_ON(((n) & ((n) - 1)) != 0) | ^~~~~~~~~~~~ include/linux/bitfield.h:54:3: note: in expansion of macro '__BUILD_BUG_ON_NOT_POWER_OF_2' 54 | __BUILD_BUG_ON_NOT_POWER_OF_2((_mask) + | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/bitfield.h:94:3: note: in expansion of macro '__BF_FIELD_CHECK' 94 | __BF_FIELD_CHECK(_mask, 0ULL, _val, "FIELD_PREP: "); | ^~~~~~~~~~~~~~~~ drivers/phy/intel/phy-intel-combo.c:137:13: note: in expansion of macro 'FIELD_PREP' 137 | reg_val |= FIELD_PREP(mask, val); | ^~~~~~~~~~ vim +/__compiletime_assert_37 +350 include/linux/compiler.h 9a8ab1c39970a4 Daniel Santos 2013-02-21 336 9a8ab1c39970a4 Daniel Santos 2013-02-21 337 #define _compiletime_assert(condition, msg, prefix, suffix) \ 9a8ab1c39970a4 Daniel Santos 2013-02-21 338 __compiletime_assert(condition, msg, prefix, suffix) 9a8ab1c39970a4 Daniel Santos 2013-02-21 339 9a8ab1c39970a4 Daniel Santos 2013-02-21 340 /** 9a8ab1c39970a4 Daniel Santos 2013-02-21 341 * compiletime_assert - break build and emit msg if condition is false 9a8ab1c39970a4 Daniel Santos 2013-02-21 342 * @condition: a compile-time constant condition to check 9a8ab1c39970a4 Daniel Santos 2013-02-21 343 * @msg: a message to emit if condition is false 9a8ab1c39970a4 Daniel Santos 2013-02-21 344 * 9a8ab1c39970a4 Daniel Santos 2013-02-21 345 * In tradition of POSIX assert, this macro will break the build if the 9a8ab1c39970a4 Daniel Santos 2013-02-21 346 * supplied condition is *false*, emitting the supplied error message if the 9a8ab1c39970a4 Daniel Santos 2013-02-21 347 * compiler has support to do so. 9a8ab1c39970a4 Daniel Santos 2013-02-21 348 */ 9a8ab1c39970a4 Daniel Santos 2013-02-21 349 #define compiletime_assert(condition, msg) \ af9c5d2e3b3558 Vegard Nossum 2020-04-06 @350 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) 9a8ab1c39970a4 Daniel Santos 2013-02-21 351 :::::: The code at line 350 was first introduced by commit :::::: af9c5d2e3b355854ff0e4acfbfbfadcd5198a349 compiler.h: fix error in BUILD_BUG_ON() reporting :::::: TO: Vegard Nossum <vegard.nossum(a)oracle.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org