tree: https://git.kernel.org/pub/scm/linux/kernel/git/sashal/linux-stable.git queue-4.19 head: 4b01732de5278618d8b013fa300638742392d507 commit: 78d05b0360dd6e0b3a12d1183ce109ea8e05d24c [276/309] x86/pti/32: Calculate the various PTI cpu_entry_area sizes correctly, make the CPU_ENTRY_AREA_PAGES assert precise config: i386-randconfig-d001-20191129 (attached as .config) compiler: gcc-7 (Debian 7.5.0-1) 7.5.0 reproduce: git checkout 78d05b0360dd6e0b3a12d1183ce109ea8e05d24c # save the attached .config to linux build tree make ARCH=i386 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/export.h:45:0, from include/linux/linkage.h:7, from include/linux/preempt.h:10, from include/linux/spinlock.h:51, from arch/x86/mm/cpu_entry_area.c:3: In function 'setup_cpu_entry_area_ptes', inlined from 'setup_cpu_entry_areas' at arch/x86/mm/cpu_entry_area.c:209:2: _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:329:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:348:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:69:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ arch/x86/mm/cpu_entry_area.c:192:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON((CPU_ENTRY_AREA_PAGES+1)*PAGE_SIZE != CPU_ENTRY_AREA_MAP_SIZE); ^~~~~~~~~~~~ -- In file included from include/linux/export.h:45:0, from include/linux/linkage.h:7, from include/linux/preempt.h:10, from include/linux/spinlock.h:51, from arch/x86//mm/cpu_entry_area.c:3: In function 'setup_cpu_entry_area_ptes', inlined from 'setup_cpu_entry_areas' at arch/x86//mm/cpu_entry_area.c:209:2: _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:329:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:348:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:45:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:69:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ arch/x86//mm/cpu_entry_area.c:192:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON((CPU_ENTRY_AREA_PAGES+1)*PAGE_SIZE != CPU_ENTRY_AREA_MAP_SIZE); ^~~~~~~~~~~~ vim +/__compiletime_assert_192 +348 include/linux/compiler.h 9a8ab1c39970a4 Daniel Santos 2013-02-21 334 9a8ab1c39970a4 Daniel Santos 2013-02-21 335 #define _compiletime_assert(condition, msg, prefix, suffix) \ 9a8ab1c39970a4 Daniel Santos 2013-02-21 336 __compiletime_assert(condition, msg, prefix, suffix) 9a8ab1c39970a4 Daniel Santos 2013-02-21 337 9a8ab1c39970a4 Daniel Santos 2013-02-21 338 /** 9a8ab1c39970a4 Daniel Santos 2013-02-21 339 * compiletime_assert - break build and emit msg if condition is false 9a8ab1c39970a4 Daniel Santos 2013-02-21 340 * @condition: a compile-time constant condition to check 9a8ab1c39970a4 Daniel Santos 2013-02-21 341 * @msg: a message to emit if condition is false 9a8ab1c39970a4 Daniel Santos 2013-02-21 342 * 9a8ab1c39970a4 Daniel Santos 2013-02-21 343 * In tradition of POSIX assert, this macro will break the build if the 9a8ab1c39970a4 Daniel Santos 2013-02-21 344 * supplied condition is *false*, emitting the supplied error message if the 9a8ab1c39970a4 Daniel Santos 2013-02-21 345 * compiler has support to do so. 9a8ab1c39970a4 Daniel Santos 2013-02-21 346 */ 9a8ab1c39970a4 Daniel Santos 2013-02-21 347 #define compiletime_assert(condition, msg) \ 9a8ab1c39970a4 Daniel Santos 2013-02-21 @348 _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) 9a8ab1c39970a4 Daniel Santos 2013-02-21 349 :::::: The code at line 348 was first introduced by commit :::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG :::::: TO: Daniel Santos <daniel.santos(a)pobox.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation