tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable head: 4d9256c0c56bafd76b8b1517916451e168fae495 commit: 84bda0b24555d3fdf52b56040696ee1ee00700c9 [208/262] maple_tree: do not preallocate nodes for slot stores config: arm-defconfig (https://download.01.org/0day-ci/archive/20231214/202312140605.Er6kw8xG-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231214/202312140605.Er6kw8xG-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/202312140605.Er6kw8xG-lkp@xxxxxxxxx/ Note: the akpm-mm/mm-unstable HEAD 4d9256c0c56bafd76b8b1517916451e168fae495 builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): >> lib/maple_tree.c:5506:25: error: no member named 'end' in 'struct ma_state' if ((node_size == mas->end) && ((!mt_in_rcu(mas->tree)) ~~~ ^ 1 error generated. vim +5506 lib/maple_tree.c 5465 5466 /** 5467 * mas_preallocate() - Preallocate enough nodes for a store operation 5468 * @mas: The maple state 5469 * @entry: The entry that will be stored 5470 * @gfp: The GFP_FLAGS to use for allocations. 5471 * 5472 * Return: 0 on success, -ENOMEM if memory could not be allocated. 5473 */ 5474 int mas_preallocate(struct ma_state *mas, void *entry, gfp_t gfp) 5475 { 5476 MA_WR_STATE(wr_mas, mas, entry); 5477 unsigned char node_size; 5478 int request = 1; 5479 int ret; 5480 5481 5482 if (unlikely(!mas->index && mas->last == ULONG_MAX)) 5483 goto ask_now; 5484 5485 mas_wr_store_setup(&wr_mas); 5486 wr_mas.content = mas_start(mas); 5487 /* Root expand */ 5488 if (unlikely(mas_is_none(mas) || mas_is_ptr(mas))) 5489 goto ask_now; 5490 5491 if (unlikely(!mas_wr_walk(&wr_mas))) { 5492 /* Spanning store, use worst case for now */ 5493 request = 1 + mas_mt_height(mas) * 3; 5494 goto ask_now; 5495 } 5496 5497 /* At this point, we are at the leaf node that needs to be altered. */ 5498 /* Exact fit, no nodes needed. */ 5499 if (wr_mas.r_min == mas->index && wr_mas.r_max == mas->last) 5500 return 0; 5501 5502 mas_wr_end_piv(&wr_mas); 5503 node_size = mas_wr_new_end(&wr_mas); 5504 5505 /* Slot store, does not require additional nodes */ > 5506 if ((node_size == mas->end) && ((!mt_in_rcu(mas->tree)) 5507 || (wr_mas.offset_end - mas->offset == 1))) 5508 return 0; 5509 5510 if (node_size >= mt_slots[wr_mas.type]) { 5511 /* Split, worst case for now. */ 5512 request = 1 + mas_mt_height(mas) * 2; 5513 goto ask_now; 5514 } 5515 5516 /* New root needs a singe node */ 5517 if (unlikely(mte_is_root(mas->node))) 5518 goto ask_now; 5519 5520 /* Potential spanning rebalance collapsing a node, use worst-case */ 5521 if (node_size - 1 <= mt_min_slots[wr_mas.type]) 5522 request = mas_mt_height(mas) * 2 - 1; 5523 5524 /* node store, slot store needs one node */ 5525 ask_now: 5526 mas_node_count_gfp(mas, request, gfp); 5527 mas->mas_flags |= MA_STATE_PREALLOC; 5528 if (likely(!mas_is_err(mas))) 5529 return 0; 5530 5531 mas_set_alloc_req(mas, 0); 5532 ret = xa_err(mas->node); 5533 mas_reset(mas); 5534 mas_destroy(mas); 5535 mas_reset(mas); 5536 return ret; 5537 } 5538 EXPORT_SYMBOL_GPL(mas_preallocate); 5539 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
