tree: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.x86/kpti head: c7ddf30cab554658b154ee16ae5e5d577ff530bf commit: 9ebd9d9cdbc90021a5e320fb054cf48c027e6d34 [50/65] x86/fixmap: Add ldt entries to user shared fixmap config: x86_64-allmodconfig (attached as .config) compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025 reproduce: git checkout 9ebd9d9cdbc90021a5e320fb054cf48c027e6d34 # save the attached .config to linux build tree make ARCH=x86_64 All error/warnings (new ones prefixed by >>): In file included from include/linux/init.h:5:0, from arch/x86//kernel/head64.c:9: arch/x86//kernel/head64.c: In function 'x86_64_start_kernel': >> include/linux/compiler.h:319:38: error: call to '__compiletime_assert_321' declared with attribute error: BUILD_BUG_ON failed: MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:299:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:319:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:47:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:71:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ >> arch/x86//kernel/head64.c:321:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE); ^~~~~~~~~~~~ >> include/linux/compiler.h:319:38: error: call to '__compiletime_assert_326' declared with attribute error: BUILD_BUG_ON failed: !(((MODULES_END - 1) & PGDIR_MASK) == (__START_KERNEL & PGDIR_MASK)) _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:299:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:319:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:47:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:71:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ arch/x86//kernel/head64.c:325:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) == ^~~~~~~~~~~~ -- In file included from include/linux/init.h:5:0, from arch/x86/kernel/head64.c:9: arch/x86/kernel/head64.c: In function 'x86_64_start_kernel': >> include/linux/compiler.h:319:38: error: call to '__compiletime_assert_321' declared with attribute error: BUILD_BUG_ON failed: MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:299:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:319:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:47:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:71:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ arch/x86/kernel/head64.c:321:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(MODULES_LEN + KERNEL_IMAGE_SIZE > 2*PUD_SIZE); ^~~~~~~~~~~~ >> include/linux/compiler.h:319:38: error: call to '__compiletime_assert_326' declared with attribute error: BUILD_BUG_ON failed: !(((MODULES_END - 1) & PGDIR_MASK) == (__START_KERNEL & PGDIR_MASK)) _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:299:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:319:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:47:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:71:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^~~~~~~~~~~~~~~~ arch/x86/kernel/head64.c:325:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(!(((MODULES_END - 1) & PGDIR_MASK) == ^~~~~~~~~~~~ vim +/__compiletime_assert_321 +319 include/linux/compiler.h 9a8ab1c3 Daniel Santos 2013-02-21 305 9a8ab1c3 Daniel Santos 2013-02-21 306 #define _compiletime_assert(condition, msg, prefix, suffix) \ 9a8ab1c3 Daniel Santos 2013-02-21 307 __compiletime_assert(condition, msg, prefix, suffix) 9a8ab1c3 Daniel Santos 2013-02-21 308 9a8ab1c3 Daniel Santos 2013-02-21 309 /** 9a8ab1c3 Daniel Santos 2013-02-21 310 * compiletime_assert - break build and emit msg if condition is false 9a8ab1c3 Daniel Santos 2013-02-21 311 * @condition: a compile-time constant condition to check 9a8ab1c3 Daniel Santos 2013-02-21 312 * @msg: a message to emit if condition is false 9a8ab1c3 Daniel Santos 2013-02-21 313 * 9a8ab1c3 Daniel Santos 2013-02-21 314 * In tradition of POSIX assert, this macro will break the build if the 9a8ab1c3 Daniel Santos 2013-02-21 315 * supplied condition is *false*, emitting the supplied error message if the 9a8ab1c3 Daniel Santos 2013-02-21 316 * compiler has support to do so. 9a8ab1c3 Daniel Santos 2013-02-21 317 */ 9a8ab1c3 Daniel Santos 2013-02-21 318 #define compiletime_assert(condition, msg) \ 9a8ab1c3 Daniel Santos 2013-02-21 @319 _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) 9a8ab1c3 Daniel Santos 2013-02-21 320 :::::: The code at line 319 was first introduced by commit :::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG :::::: TO: Daniel Santos :::::: CC: Linus Torvalds --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation