Hi Zi, [auto build test ERROR on mmotm/master] [also build test ERROR on v4.12-rc2 next-20170525] [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/Zi-Yan/mm-page-migration-enhancement-for-thp/20170526-003749 base: git://git.cmpxchg.org/linux-mmotm.git master config: i386-randconfig-x016-201721 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All error/warnings (new ones prefixed by >>): In file included from fs//proc/task_mmu.c:15:0: include/linux/swapops.h: In function 'swp_entry_to_pmd': include/linux/swapops.h:222:16: warning: missing braces around initializer [-Wmissing-braces] return (pmd_t){{ 0 }}; ^ include/linux/swapops.h:222:16: note: (near initialization for '(anonymous)') In file included from include/asm-generic/bug.h:4:0, from arch/x86/include/asm/bug.h:81, from include/linux/bug.h:4, from include/linux/mmdebug.h:4, from include/linux/mm.h:8, from fs//proc/task_mmu.c:1: In function 'pmd_to_swp_entry.isra.34', inlined from 'pagemap_pmd_range' at fs//proc/task_mmu.c:1242:16: >> include/linux/compiler.h:525:38: error: call to '__compiletime_assert_215' declared with attribute error: BUILD_BUG failed _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/compiler.h:508:4: note: in definition of macro '__compiletime_assert' prefix ## suffix(); \ ^~~~~~ include/linux/compiler.h:525:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^~~~~~~~~~~~~~~~~~~ include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/bug.h:88:21: note: in expansion of macro 'BUILD_BUG_ON_MSG' #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed") ^~~~~~~~~~~~~~~~ >> include/linux/swapops.h:215:2: note: in expansion of macro 'BUILD_BUG' BUILD_BUG(); ^~~~~~~~~ vim +/BUILD_BUG +215 include/linux/swapops.h 2182e56bf Zi Yan 2017-05-25 199 static inline void set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw, 2182e56bf Zi Yan 2017-05-25 200 struct page *page) 2182e56bf Zi Yan 2017-05-25 201 { 2182e56bf Zi Yan 2017-05-25 202 BUILD_BUG(); 2182e56bf Zi Yan 2017-05-25 203 } 2182e56bf Zi Yan 2017-05-25 204 2182e56bf Zi Yan 2017-05-25 205 static inline void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, 2182e56bf Zi Yan 2017-05-25 206 struct page *new) 2182e56bf Zi Yan 2017-05-25 207 { 2182e56bf Zi Yan 2017-05-25 208 BUILD_BUG(); 2182e56bf Zi Yan 2017-05-25 209 } 2182e56bf Zi Yan 2017-05-25 210 2182e56bf Zi Yan 2017-05-25 211 static inline void pmd_migration_entry_wait(struct mm_struct *m, pmd_t *p) { } 2182e56bf Zi Yan 2017-05-25 212 2182e56bf Zi Yan 2017-05-25 213 static inline swp_entry_t pmd_to_swp_entry(pmd_t pmd) 2182e56bf Zi Yan 2017-05-25 214 { 2182e56bf Zi Yan 2017-05-25 @215 BUILD_BUG(); 2182e56bf Zi Yan 2017-05-25 216 return swp_entry(0, 0); 2182e56bf Zi Yan 2017-05-25 217 } 2182e56bf Zi Yan 2017-05-25 218 2182e56bf Zi Yan 2017-05-25 219 static inline pmd_t swp_entry_to_pmd(swp_entry_t entry) 2182e56bf Zi Yan 2017-05-25 220 { 2182e56bf Zi Yan 2017-05-25 221 BUILD_BUG(); 2182e56bf Zi Yan 2017-05-25 222 return (pmd_t){{ 0 }}; 2182e56bf Zi Yan 2017-05-25 223 } :::::: The code at line 215 was first introduced by commit :::::: 2182e56bfe80b55d1a9a8e8de04e6a5578b1dce0 mm: thp: enable thp migration in generic path :::::: TO: Zi Yan <zi.yan@xxxxxxxxxxxxxx> :::::: CC: 0day robot <fengguang.wu@xxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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