Hi Pavel, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mmotm/master] [also build test WARNING on v4.15 next-20180201] [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/Pavel-Tatashin/mm-uninitialized-struct-page-poisoning-sanity-checking/20180202-105827 base: git://git.cmpxchg.org/linux-mmotm.git master config: x86_64-randconfig-x013-201804 (attached as .config) compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All warnings (new ones prefixed by >>): In file included from include/linux/page_ref.h:7:0, from include/linux/mm.h:26, from include/linux/memblock.h:18, from mm/memblock.c:21: mm/memblock.c: In function 'memblock_virt_alloc_try_nid_raw': >> include/linux/page-flags.h:159:29: warning: overflow in implicit constant conversion [-Woverflow] #define PAGE_POISON_PATTERN ~0ul ^ >> mm/memblock.c:1376:15: note: in expansion of macro 'PAGE_POISON_PATTERN' memset(ptr, PAGE_POISON_PATTERN, size); ^~~~~~~~~~~~~~~~~~~ vim +159 include/linux/page-flags.h 158 > 159 #define PAGE_POISON_PATTERN ~0ul 160 static inline int PagePoisoned(const struct page *page) 161 { 162 return page->flags == PAGE_POISON_PATTERN; 163 } 164 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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