Hi Naoya, [auto build test WARNING on mmotm/master] [also build test WARNING on next-20170310] [cannot apply to v4.11-rc2] [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/20170315-042736 base: git://git.cmpxchg.org/linux-mmotm.git master config: m68k-sun3_defconfig (attached as .config) compiler: m68k-linux-gcc (GCC) 4.9.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=m68k All warnings (new ones prefixed by >>): In file included from fs/proc/task_mmu.c:15:0: include/linux/swapops.h: In function 'remove_migration_pmd': include/linux/swapops.h:209:2: warning: 'return' with a value, in function returning void return 0; ^ include/linux/swapops.h: In function 'swp_entry_to_pmd': >> include/linux/swapops.h:223:2: warning: missing braces around initializer [-Wmissing-braces] return (pmd_t){ 0 }; ^ include/linux/swapops.h:223:2: warning: (near initialization for '(anonymous).pmd') [-Wmissing-braces] vim +223 include/linux/swapops.h 203 } 204 205 static inline void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, 206 struct page *new) 207 { 208 BUILD_BUG(); > 209 return 0; 210 } 211 212 static inline void pmd_migration_entry_wait(struct mm_struct *m, pmd_t *p) { } 213 214 static inline swp_entry_t pmd_to_swp_entry(pmd_t pmd) 215 { 216 BUILD_BUG(); 217 return swp_entry(0, 0); 218 } 219 220 static inline pmd_t swp_entry_to_pmd(swp_entry_t entry) 221 { 222 BUILD_BUG(); > 223 return (pmd_t){ 0 }; 224 } 225 226 static inline int is_pmd_migration_entry(pmd_t pmd) --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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