On Tue, May 19, 2020 at 04:32:29PM +0800, kbuild test robot wrote: > tree: https://github.com/hnaz/linux-mm master > head: 2bbf0589bfeb27800c730b76eacf34528eee5418 > commit: 3ae9a28a04fa372644c181c9419b3312efe55d77 [177/523] mm: free_area_init: allow defining max_zone_pfn in descending order > config: arc-defconfig (attached as .config) > compiler: arc-elf-gcc (GCC) 9.3.0 > reproduce: > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross > chmod +x ~/bin/make.cross > git checkout 3ae9a28a04fa372644c181c9419b3312efe55d77 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arc > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kbuild test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>, old ones prefixed by <<): > > arch/arc/mm/init.c:39:13: warning: no previous prototype for 'arc_get_mem_sz' [-Wmissing-prototypes] > 39 | long __init arc_get_mem_sz(void) > | ^~~~~~~~~~~~~~ > >> arch/arc/mm/init.c:80:6: warning: no previous prototype for 'arch_has_descending_max_zone_pfns' [-Wmissing-prototypes] > 80 | bool arch_has_descending_max_zone_pfns(void) > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > arch/arc/mm/init.c:91:13: warning: no previous prototype for 'setup_arch_memory' [-Wmissing-prototypes] > 91 | void __init setup_arch_memory(void) > | ^~~~~~~~~~~~~~~~~ > > vim +/arch_has_descending_max_zone_pfns +80 arch/arc/mm/init.c > > 79 > > 80 bool arch_has_descending_max_zone_pfns(void) > 81 { > 82 return true; > 83 } > 84 > > --- > 0-DAY CI Kernel Test Service, Intel Corporation > https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx Here is the fix. >From f1cfbc50f1eee57c6c648e08dccaf5f0eb699578 Mon Sep 17 00:00:00 2001 From: Mike Rapoport <rppt@xxxxxxxxxxxxx> Date: Tue, 19 May 2020 20:40:25 +0300 Subject: [PATCH] mm: add forward declaration of arch_has_descending_max_zone_pfns() to silence gcc warning reported by kbuild test robot: >> arch/arc/mm/init.c:80:6: warning: no previous prototype for 'arch_has_descending_max_zone_pfns' [-Wmissing-prototypes] 80 | bool arch_has_descending_max_zone_pfns(void) Reported-by: kbuild test robot <lkp@xxxxxxxxx> Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx> --- include/linux/mm.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index d184c47079da..0c3d8187cff9 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2351,6 +2351,7 @@ static inline unsigned long get_num_physpages(void) * sparse_memory_present_with_active_regions() calls memory_present() for * each range when SPARSEMEM is enabled. */ +bool arch_has_descending_max_zone_pfns(void); void free_area_init(unsigned long *max_zone_pfn); unsigned long node_map_pfn_alignment(void); unsigned long __absent_pages_in_range(int nid, unsigned long start_pfn, -- 2.26.2 -- Sincerely yours, Mike.
