Hi Sidhartha, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.6-rc5 next-20231009] [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/Sidhartha-Kumar/maple_tree-introduce-mas_prealloc_calc/20231010-041859 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20231009201639.920512-2-sidhartha.kumar%40oracle.com patch subject: [PATCH 1/3] maple_tree: introduce mas_prealloc_calc() config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20231010/202310100603.qsn3ruBx-lkp@xxxxxxxxx/config) compiler: m68k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231010/202310100603.qsn3ruBx-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/202310100603.qsn3ruBx-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> lib/maple_tree.c:5428:5: warning: no previous prototype for 'mas_prealloc_calc' [-Wmissing-prototypes] 5428 | int mas_prealloc_calc(struct ma_wr_state *wr_mas) | ^~~~~~~~~~~~~~~~~ vim +/mas_prealloc_calc +5428 lib/maple_tree.c 5420 5421 /** 5422 * mas_prealloc_calc() - Calculate number of nodes needed for a 5423 * store operation. 5424 * @wr_mas: The maple write state 5425 * 5426 * Return: Number of nodes required for preallocation. 5427 */ > 5428 int mas_prealloc_calc(struct ma_wr_state *wr_mas) 5429 { 5430 struct ma_state *mas = wr_mas->mas; 5431 unsigned char node_size; 5432 5433 if (unlikely(!mas->index && mas->last == ULONG_MAX)) 5434 return 1; 5435 5436 /* Root expand */ 5437 if (unlikely(mas_is_none(mas) || mas_is_ptr(mas))) 5438 return 1; 5439 5440 if (unlikely(!mas_wr_walk(wr_mas))) { 5441 /* Spanning store, use worst case for now */ 5442 return 1 + mas_mt_height(mas) * 3; 5443 } 5444 5445 /* At this point, we are at the leaf node that needs to be altered. */ 5446 /* Exact fit, no nodes needed. */ 5447 if (wr_mas->r_min == mas->index && wr_mas->r_max == mas->last) 5448 return 0; 5449 5450 mas_wr_end_piv(wr_mas); 5451 node_size = mas_wr_new_end(wr_mas); 5452 if (node_size >= mt_slots[wr_mas->type]) { 5453 /* Split, worst case for now. */ 5454 return 1 + mas_mt_height(mas) * 2; 5455 } 5456 5457 /* New root needs a singe node */ 5458 if (unlikely(mte_is_root(mas->node))) 5459 return 1; 5460 5461 /* Potential spanning rebalance collapsing a node, use worst-case */ 5462 if (node_size - 1 <= mt_min_slots[wr_mas->type]) 5463 return mas_mt_height(mas) * 2 - 1; 5464 5465 /* node store, slot store needs one node */ 5466 return 1; 5467 } 5468 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
