On 19 Jul 2017, at 4:04, kbuild test robot wrote: > Hi Zi, > > [auto build test WARNING on mmotm/master] > [also build test WARNING on v4.13-rc1 next-20170718] > [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] > > url: https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2F0day-ci%2Flinux%2Fcommits%2FZi-Yan%2Fmm-page-migration-enhancement-for-thp%2F20170718-095519&data=02%7C01%7Czi.yan%40cs.rutgers.edu%7Ca711ac47d4c0436ef66f08d4ce7cf30c%7Cb92d2b234d35447093ff69aca6632ffe%7C1%7C0%7C636360483431631457&sdata=NpxRpWbxe6o56xDJYpw1K6wgQo11IPCAbG2tE8l%2BU6E%3D&reserved=0 > base: git://git.cmpxchg.org/linux-mmotm.git master > config: xtensa-common_defconfig (attached as .config) > compiler: xtensa-linux-gcc (GCC) 4.9.0 > reproduce: > wget https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fraw.githubusercontent.com%2F01org%2Flkp-tests%2Fmaster%2Fsbin%2Fmake.cross&data=02%7C01%7Czi.yan%40cs.rutgers.edu%7Ca711ac47d4c0436ef66f08d4ce7cf30c%7Cb92d2b234d35447093ff69aca6632ffe%7C1%7C0%7C636360483431631457&sdata=rBCfu0xUg3v%2B8r%2Be2tsiqRcqw%2FEZSTa4OtF0hU%2FqMbc%3D&reserved=0 -O ~/bin/make.cross > chmod +x ~/bin/make.cross > # save the attached .config to linux build tree > make.cross ARCH=xtensa > > All warnings (new ones prefixed by >>): > > In file included from mm/vmscan.c:55:0: > include/linux/swapops.h: In function 'swp_entry_to_pmd': >>> include/linux/swapops.h:220:2: warning: missing braces around initializer [-Wmissing-braces] > return (pmd_t){ 0 }; > ^ > include/linux/swapops.h:220:2: warning: (near initialization for '(anonymous).pud') [-Wmissing-braces] > > vim +220 include/linux/swapops.h > > 217 > 218 static inline pmd_t swp_entry_to_pmd(swp_entry_t entry) > 219 { >> 220 return (pmd_t){ 0 }; > 221 } > 222 It is a GCC 4.9.0 bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119 Upgrading GCC can get rid of this warning. -- Best Regards Yan Zi
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