Hi Pingfan, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v4.20-rc5 next-20181207] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Pingfan-Liu/mm-pageblock-throw-compiling-time-error-if-pageblock_bits-can-not-hold-MIGRATE_TYPES/20181207-161514 config: x86_64-randconfig-x017-201848 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): In file included from include/asm-generic/bug.h:5:0, from arch/x86/include/asm/bug.h:47, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/mm.h:9, from mm/page_alloc.c:18: mm/page_alloc.c: In function 'set_pfnblock_flags_mask': >> include/linux/compiler.h:372:38: error: call to '__compiletime_assert_429' declared with attribute error: BUILD_BUG_ON failed: order_base_2(MIGRATE_TYPES) != (PB_migratetype_bits - 1) _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:353:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:372:2: 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) ^~~~~~~~~~~~~~~~ mm/page_alloc.c:428:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(order_base_2(MIGRATE_TYPES) ^~~~~~~~~~~~ vim +/__compiletime_assert_429 +372 include/linux/compiler.h 9a8ab1c3 Daniel Santos 2013-02-21 358 9a8ab1c3 Daniel Santos 2013-02-21 359 #define _compiletime_assert(condition, msg, prefix, suffix) \ 9a8ab1c3 Daniel Santos 2013-02-21 360 __compiletime_assert(condition, msg, prefix, suffix) 9a8ab1c3 Daniel Santos 2013-02-21 361 9a8ab1c3 Daniel Santos 2013-02-21 362 /** 9a8ab1c3 Daniel Santos 2013-02-21 363 * compiletime_assert - break build and emit msg if condition is false 9a8ab1c3 Daniel Santos 2013-02-21 364 * @condition: a compile-time constant condition to check 9a8ab1c3 Daniel Santos 2013-02-21 365 * @msg: a message to emit if condition is false 9a8ab1c3 Daniel Santos 2013-02-21 366 * 9a8ab1c3 Daniel Santos 2013-02-21 367 * In tradition of POSIX assert, this macro will break the build if the 9a8ab1c3 Daniel Santos 2013-02-21 368 * supplied condition is *false*, emitting the supplied error message if the 9a8ab1c3 Daniel Santos 2013-02-21 369 * compiler has support to do so. 9a8ab1c3 Daniel Santos 2013-02-21 370 */ 9a8ab1c3 Daniel Santos 2013-02-21 371 #define compiletime_assert(condition, msg) \ 9a8ab1c3 Daniel Santos 2013-02-21 @372 _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) 9a8ab1c3 Daniel Santos 2013-02-21 373 :::::: The code at line 372 was first introduced by commit :::::: 9a8ab1c39970a4938a72d94e6fd13be88a797590 bug.h, compiler.h: introduce compiletime_assert & BUILD_BUG_ON_MSG :::::: TO: Daniel Santos <daniel.santos@xxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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