Hi Vlastimil, [auto build test ERROR on mmotm/master] [also build test ERROR on v4.9-rc8 next-20161208] [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/Vlastimil-Babka/mm-page_alloc-don-t-convert-pfn-to-idx-when-merging/20161209-192634 base: git://git.cmpxchg.org/linux-mmotm.git master config: i386-randconfig-s1-201649 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=i386 All errors (new ones prefixed by >>): mm/page_isolation.c: In function 'unset_migratetype_isolate': >> mm/page_isolation.c:106:16: error: implicit declaration of function '__find_buddy_index' [-Werror=implicit-function-declaration] buddy_idx = __find_buddy_index(page_idx, order); ^~~~~~~~~~~~~~~~~~ Cyclomatic Complexity 5 include/linux/compiler.h:__read_once_size Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:variable_test_bit Cyclomatic Complexity 1 include/linux/list.h:hlist_empty Cyclomatic Complexity 1 include/linux/cpumask.h:cpumask_check Cyclomatic Complexity 1 include/linux/cpumask.h:cpumask_test_cpu Cyclomatic Complexity 1 arch/x86/include/asm/atomic.h:atomic_read Cyclomatic Complexity 2 arch/x86/include/asm/jump_label.h:arch_static_branch Cyclomatic Complexity 1 include/linux/jump_label.h:static_key_false Cyclomatic Complexity 5 arch/x86/include/asm/preempt.h:__preempt_count_add Cyclomatic Complexity 5 arch/x86/include/asm/preempt.h:__preempt_count_sub Cyclomatic Complexity 1 include/linux/spinlock.h:spinlock_check Cyclomatic Complexity 1 include/linux/spinlock.h:spin_unlock_irqrestore Cyclomatic Complexity 1 include/linux/nodemask.h:node_state Cyclomatic Complexity 1 include/linux/rcupdate.h:rcu_read_lock_sched_notrace Cyclomatic Complexity 1 include/linux/rcupdate.h:rcu_read_unlock_sched_notrace Cyclomatic Complexity 2 include/linux/notifier.h:notifier_to_errno Cyclomatic Complexity 1 arch/x86/include/asm/topology.h:numa_node_id Cyclomatic Complexity 1 include/linux/topology.h:numa_mem_id Cyclomatic Complexity 1 include/linux/gfp.h:gfp_zonelist Cyclomatic Complexity 1 include/linux/gfp.h:node_zonelist Cyclomatic Complexity 1 include/linux/gfp.h:__alloc_pages Cyclomatic Complexity 2 include/linux/gfp.h:__alloc_pages_node Cyclomatic Complexity 2 include/linux/gfp.h:alloc_pages_node Cyclomatic Complexity 1 include/linux/page-flags.h:PageHighMem Cyclomatic Complexity 1 include/linux/page-flags.h:PageHWPoison Cyclomatic Complexity 1 include/linux/page-flags.h:PageHuge Cyclomatic Complexity 1 include/linux/page-flags.h:PageBuddy Cyclomatic Complexity 1 include/linux/mm.h:page_zonenum Cyclomatic Complexity 1 include/linux/mm.h:page_zone Cyclomatic Complexity 2 include/linux/vmstat.h:__mod_zone_freepage_state Cyclomatic Complexity 1 include/linux/page-isolation.h:is_migrate_isolate_page Cyclomatic Complexity 1 include/linux/memory.h:memory_isolate_notify Cyclomatic Complexity 1 mm/internal.h:page_order Cyclomatic Complexity 6 include/trace/events/page_isolation.h:trace_test_pages_isolated Cyclomatic Complexity 1 include/linux/seq_buf.h:seq_buf_has_overflowed Cyclomatic Complexity 3 include/linux/trace_seq.h:trace_seq_has_overflowed Cyclomatic Complexity 1 arch/x86/include/asm/stacktrace.h:caller_frame_pointer Cyclomatic Complexity 1 include/linux/perf_event.h:perf_fetch_caller_regs Cyclomatic Complexity 1 include/linux/trace_events.h:trace_handle_return Cyclomatic Complexity 5 include/linux/trace_events.h:trace_trigger_soft_disabled Cyclomatic Complexity 1 include/trace/events/page_isolation.h:trace_event_get_offsets_test_pages_isolated Cyclomatic Complexity 2 mm/page_isolation.c:__first_valid_page Cyclomatic Complexity 5 mm/page_isolation.c:__test_page_isolated_in_pageblock Cyclomatic Complexity 4 include/trace/events/page_isolation.h:trace_event_define_fields_test_pages_isolated Cyclomatic Complexity 6 include/trace/events/page_isolation.h:perf_trace_test_pages_isolated Cyclomatic Complexity 3 include/trace/events/page_isolation.h:trace_event_raw_event_test_pages_isolated Cyclomatic Complexity 3 include/trace/events/page_isolation.h:trace_raw_output_test_pages_isolated Cyclomatic Complexity 5 mm/page_isolation.c:set_migratetype_isolate Cyclomatic Complexity 7 mm/page_isolation.c:unset_migratetype_isolate Cyclomatic Complexity 5 mm/page_isolation.c:start_isolate_page_range Cyclomatic Complexity 4 mm/page_isolation.c:undo_isolate_page_range Cyclomatic Complexity 6 mm/page_isolation.c:test_pages_isolated Cyclomatic Complexity 3 mm/page_isolation.c:alloc_migrate_target cc1: some warnings being treated as errors vim +/__find_buddy_index +106 mm/page_isolation.c 3c605096 Joonsoo Kim 2014-11-13 100 * these pages to be merged. 3c605096 Joonsoo Kim 2014-11-13 101 */ 3c605096 Joonsoo Kim 2014-11-13 102 if (PageBuddy(page)) { 3c605096 Joonsoo Kim 2014-11-13 103 order = page_order(page); 3c605096 Joonsoo Kim 2014-11-13 104 if (order >= pageblock_order) { 3c605096 Joonsoo Kim 2014-11-13 105 page_idx = page_to_pfn(page) & ((1 << MAX_ORDER) - 1); 3c605096 Joonsoo Kim 2014-11-13 @106 buddy_idx = __find_buddy_index(page_idx, order); 3c605096 Joonsoo Kim 2014-11-13 107 buddy = page + (buddy_idx - page_idx); 3c605096 Joonsoo Kim 2014-11-13 108 1ae7013d Hui Zhu 2015-05-14 109 if (pfn_valid_within(page_to_pfn(buddy)) && :::::: The code at line 106 was first introduced by commit :::::: 3c605096d3158216ba9326a16266f6ba128c2c8d mm/page_alloc: restrict max order of merging on isolated pageblock :::::: 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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