On 03/14/2017 04:19 PM, kbuild test robot wrote: > 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': I will remove "return 0;" in next version. --- a/include/linux/swapops.h +++ b/include/linux/swapops.h @@ -208,7 +208,6 @@ static inline void remove_migration_pmd(struct page_vma_mapped_walk *pvmw, struct page *new) { BUILD_BUG(); - return 0; } static inline void pmd_migration_entry_wait(struct mm_struct *m, pmd_t *p) { } >>> 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] I do not have any warning with gcc 6.3.0. This seems to be a GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119). -- Best Regards, Yan Zi
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