Hi Joonsoo, [auto build test ERROR on net/master] [also build test ERROR on v4.6-rc1 next-20160327] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/js1304-gmail-com/mm-page_ref-use-page_ref-helper-instead-of-direct-modification-of-_count/20160328-140113 config: i386-tinyconfig (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): In file included from include/linux/mm.h:25:0, from include/linux/suspend.h:8, from arch/x86/kernel/asm-offsets.c:12: include/linux/page_ref.h: In function 'page_ref_count': >> include/linux/page_ref.h:66:26: error: 'struct page' has no member named '_count' return atomic_read(&page->_count); ^ include/linux/page_ref.h: In function 'page_count': include/linux/page_ref.h:71:41: error: 'struct page' has no member named '_count' return atomic_read(&compound_head(page)->_count); ^ include/linux/page_ref.h: In function 'set_page_count': include/linux/page_ref.h:76:18: error: 'struct page' has no member named '_count' atomic_set(&page->_count, v); ^ include/linux/page_ref.h: In function 'page_ref_add': include/linux/page_ref.h:92:22: error: 'struct page' has no member named '_count' atomic_add(nr, &page->_count); ^ include/linux/page_ref.h: In function 'page_ref_sub': include/linux/page_ref.h:99:22: error: 'struct page' has no member named '_count' atomic_sub(nr, &page->_count); ^ include/linux/page_ref.h: In function 'page_ref_inc': include/linux/page_ref.h:106:18: error: 'struct page' has no member named '_count' atomic_inc(&page->_count); ^ include/linux/page_ref.h: In function 'page_ref_dec': include/linux/page_ref.h:113:18: error: 'struct page' has no member named '_count' atomic_dec(&page->_count); ^ include/linux/page_ref.h: In function 'page_ref_sub_and_test': include/linux/page_ref.h:120:41: error: 'struct page' has no member named '_count' int ret = atomic_sub_and_test(nr, &page->_count); ^ include/linux/page_ref.h: In function 'page_ref_dec_and_test': include/linux/page_ref.h:129:37: error: 'struct page' has no member named '_count' int ret = atomic_dec_and_test(&page->_count); ^ In file included from include/linux/atomic.h:4:0, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets.c:8: include/linux/page_ref.h: In function 'page_ref_dec_return': include/linux/page_ref.h:138:35: error: 'struct page' has no member named '_count' int ret = atomic_dec_return(&page->_count); ^ arch/x86/include/asm/atomic.h:172:53: note: in definition of macro 'atomic_dec_return' #define atomic_dec_return(v) (atomic_sub_return(1, v)) ^ In file included from include/linux/mm.h:25:0, from include/linux/suspend.h:8, from arch/x86/kernel/asm-offsets.c:12: include/linux/page_ref.h: In function 'page_ref_add_unless': include/linux/page_ref.h:147:35: error: 'struct page' has no member named '_count' int ret = atomic_add_unless(&page->_count, nr, u); ^ In file included from arch/x86/include/asm/atomic.h:4:0, from include/linux/atomic.h:4, from include/linux/crypto.h:20, from arch/x86/kernel/asm-offsets.c:8: include/linux/page_ref.h: In function 'page_ref_freeze': include/linux/page_ref.h:156:39: error: 'struct page' has no member named '_count' int ret = likely(atomic_cmpxchg(&page->_count, count, 0) == count); ^ include/linux/compiler.h:169:40: note: in definition of macro 'likely' # define likely(x) __builtin_expect(!!(x), 1) ^ In file included from include/linux/mm.h:25:0, from include/linux/suspend.h:8, from arch/x86/kernel/asm-offsets.c:12: include/linux/page_ref.h: In function 'page_ref_unfreeze': include/linux/page_ref.h:168:18: error: 'struct page' has no member named '_count' atomic_set(&page->_count, count); ^ make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1 make[2]: Target '__build' not remade because of errors. make[1]: *** [prepare0] Error 2 make[1]: Target 'prepare' not remade because of errors. make: *** [sub-make] Error 2 vim +66 include/linux/page_ref.h 95813b8f Joonsoo Kim 2016-03-17 60 } 95813b8f Joonsoo Kim 2016-03-17 61 95813b8f Joonsoo Kim 2016-03-17 62 #endif fe896d18 Joonsoo Kim 2016-03-17 63 fe896d18 Joonsoo Kim 2016-03-17 64 static inline int page_ref_count(struct page *page) fe896d18 Joonsoo Kim 2016-03-17 65 { fe896d18 Joonsoo Kim 2016-03-17 @66 return atomic_read(&page->_count); fe896d18 Joonsoo Kim 2016-03-17 67 } fe896d18 Joonsoo Kim 2016-03-17 68 fe896d18 Joonsoo Kim 2016-03-17 69 static inline int page_count(struct page *page) :::::: The code at line 66 was first introduced by commit :::::: fe896d1878949ea92ba547587bc3075cc688fb8f mm: introduce page reference manipulation functions :::::: TO: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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