Hi Alexander, kernel test robot noticed the following build warnings: [auto build test WARNING on tip/x86/core] [also build test WARNING on arm64/for-next/core akpm-mm/mm-everything linus/master v6.7-rc5 next-20231213] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Alexander-Graf/mm-memblock-Add-support-for-scratch-memory/20231213-080941 base: tip/x86/core patch link: https://lore.kernel.org/r/20231213000452.88295-3-graf%40amazon.com patch subject: [PATCH 02/15] memblock: Declare scratch memory as CMA config: arc-allnoconfig (https://download.01.org/0day-ci/archive/20231213/202312131930.gMiphjju-lkp@xxxxxxxxx/config) compiler: arc-elf-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231213/202312131930.gMiphjju-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202312131930.gMiphjju-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/memblock.c:2153:13: warning: 'reserve_scratch_mem' defined but not used [-Wunused-function] 2153 | static void reserve_scratch_mem(phys_addr_t start, phys_addr_t end) | ^~~~~~~~~~~~~~~~~~~ vim +/reserve_scratch_mem +2153 mm/memblock.c 2152 > 2153 static void reserve_scratch_mem(phys_addr_t start, phys_addr_t end) 2154 { 2155 #ifdef CONFIG_MEMBLOCK_SCRATCH 2156 ulong start_pfn = pageblock_start_pfn(PFN_DOWN(start)); 2157 ulong end_pfn = pageblock_align(PFN_UP(end)); 2158 ulong pfn; 2159 2160 for (pfn = start_pfn; pfn < end_pfn; pfn += pageblock_nr_pages) { 2161 /* Mark as CMA to prevent kernel allocations in it */ 2162 set_pageblock_migratetype(pfn_to_page(pfn), MIGRATE_CMA); 2163 } 2164 #endif 2165 } 2166 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
