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Message-ID: <202601161750.eDtUQiJr-lkp@intel.com>
Date: Fri, 16 Jan 2026 17:36:38 +0800
From: kernel test robot <lkp@...el.com>
To: "Liam R. Howlett" <Liam.Howlett@...cle.com>,
Andrew Morton <akpm@...ux-foundation.org>
Cc: oe-kbuild-all@...ts.linux.dev,
Linux Memory Management List <linux-mm@...ck.org>,
maple-tree@...ts.infradead.org, linux-kernel@...r.kernel.org,
Suren Baghdasaryan <surenb@...gle.com>,
Matthew Wilcox <willy@...radead.org>,
Sidhartha Kumar <sidhartha.kumar@...cle.com>,
Vlastimil Babka <vbabka@...e.cz>, Alice Ryhl <aliceryhl@...gle.com>,
Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
Geert Uytterhoeven <geert@...ux-m68k.org>,
Arnd Bergmann <arnd@...db.de>,
Christian Kujau <lists@...dbynature.de>,
"Liam R. Howlett" <Liam.Howlett@...cle.com>
Subject: Re: [PATCH 16/28] maple_tree: Start using maple copy node for
destination
Hi Liam,
kernel test robot noticed the following build warnings:
[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on next-20260115]
[cannot apply to akpm-mm/mm-nonmm-unstable soc/for-next linus/master v6.19-rc5]
[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/Liam-R-Howlett/maple_tree-Move-mas_spanning_rebalance-loop-to-function/20260116-034135
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20260115193647.1695937-17-Liam.Howlett%40oracle.com
patch subject: [PATCH 16/28] maple_tree: Start using maple copy node for destination
config: x86_64-randconfig-121-20260116 (https://download.01.org/0day-ci/archive/20260116/202601161750.eDtUQiJr-lkp@intel.com/config)
compiler: gcc-13 (Debian 13.3.0-16) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260116/202601161750.eDtUQiJr-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601161750.eDtUQiJr-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
>> lib/maple_tree.c:3355:37: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __rcu * @@ got struct maple_enode * @@
lib/maple_tree.c:3355:37: sparse: expected void [noderef] __rcu *
lib/maple_tree.c:3355:37: sparse: got struct maple_enode *
>> lib/maple_tree.c:3358:17: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct maple_enode const *entry @@ got void [noderef] __rcu * @@
lib/maple_tree.c:3358:17: sparse: expected struct maple_enode const *entry
lib/maple_tree.c:3358:17: sparse: got void [noderef] __rcu *
>> lib/maple_tree.c:3397:19: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct maple_enode *node @@ got void [noderef] __rcu * @@
lib/maple_tree.c:3397:19: sparse: expected struct maple_enode *node
lib/maple_tree.c:3397:19: sparse: got void [noderef] __rcu *
lib/maple_tree.c:3139:29: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __rcu * @@ got struct maple_enode * @@
lib/maple_tree.c:3139:29: sparse: expected void [noderef] __rcu *
lib/maple_tree.c:3139:29: sparse: got struct maple_enode *
>> lib/maple_tree.c:2558:52: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct maple_enode *enode @@ got void [noderef] __rcu * @@
lib/maple_tree.c:2558:52: sparse: expected struct maple_enode *enode
lib/maple_tree.c:2558:52: sparse: got void [noderef] __rcu *
lib/maple_tree.c:2803:29: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __rcu * @@ got void *content @@
lib/maple_tree.c:2803:29: sparse: expected void [noderef] __rcu *
lib/maple_tree.c:2803:29: sparse: got void *content
lib/maple_tree.c:2806:23: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __rcu * @@ got void *entry @@
lib/maple_tree.c:2806:23: sparse: expected void [noderef] __rcu *
lib/maple_tree.c:2806:23: sparse: got void *entry
>> lib/maple_tree.c:2558:52: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct maple_enode *enode @@ got void [noderef] __rcu * @@
lib/maple_tree.c:2558:52: sparse: expected struct maple_enode *enode
lib/maple_tree.c:2558:52: sparse: got void [noderef] __rcu *
lib/maple_tree.c:6899:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __rcu * @@ got struct maple_node * @@
lib/maple_tree.c:6899:30: sparse: expected void [noderef] __rcu *
lib/maple_tree.c:6899:30: sparse: got struct maple_node *
lib/maple_tree.c:6899:30: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected void [noderef] __rcu * @@ got struct maple_node * @@
lib/maple_tree.c:6899:30: sparse: expected void [noderef] __rcu *
lib/maple_tree.c:6899:30: sparse: got struct maple_node *
vim +3355 lib/maple_tree.c
3317
3318 /*
3319 * spanning_ascend() - See if a spanning store operation has to keep walking up
3320 * the tree
3321 * @cp: The maple_copy node
3322 * @l_wr_mas: The left maple write state
3323 * @r_wr_mas: The right maple write state
3324 * @sib: the maple state of the sibling
3325 *
3326 * Returns: True if another iteration is necessary.
3327 */
3328 static bool spanning_ascend(struct maple_copy *cp, struct ma_state *mas,
3329 struct ma_wr_state *l_wr_mas, struct ma_wr_state *r_wr_mas,
3330 struct ma_state *sib)
3331 {
3332 if (sib->end) {
3333 if (sib->max < l_wr_mas->mas->min)
3334 *l_wr_mas->mas = *sib;
3335 else
3336 *r_wr_mas->mas = *sib;
3337 }
3338
3339 cp_dst_to_slots(cp, l_wr_mas->mas->min, r_wr_mas->mas->max, mas);
3340 if (!cp->min && cp->max == ULONG_MAX) {
3341 /* New root */
3342 if (cp->d_count != 1) {
3343 enum maple_type mt = maple_arange_64;
3344
3345 if (!mt_is_alloc(mas->tree))
3346 mt = maple_range_64;
3347
3348 cp->data = cp->d_count;
3349 cp->s_count = 0;
3350 dst_setup(cp, mas, mt);
3351 init_cp_src(cp);
3352 node_copy(mas, cp->src[0].node, 0, cp->data, cp->max, maple_copy,
3353 cp->dst[0].node, 0, mt);
3354 node_finalise(cp->dst[0].node, mt, cp->end + 1);
> 3355 cp->slot[0] = mt_mk_node(cp->dst[0].node, mt);
3356 cp->height++;
3357 }
> 3358 WARN_ON_ONCE(cp->dst[0].node != mte_to_node(cp->slot[0]));
3359 cp->dst[0].node->parent = ma_parent_ptr(mas_tree_parent(mas));
3360 mas->min = 0;
3361 mas->max = ULONG_MAX;
3362 mas->depth = 0;
3363 mas->node = mas_root_locked(mas);
3364 return false;
3365 }
3366
3367 /* Converged and has a single destination */
3368 if ((cp->d_count == 1) &&
3369 (l_wr_mas->mas->node == r_wr_mas->mas->node)) {
3370 cp->dst[0].node->parent = ma_parent_ptr(mas_mn(mas)->parent);
3371 return false;
3372 }
3373
3374 cp->height++;
3375 wr_mas_ascend(l_wr_mas);
3376 wr_mas_ascend(r_wr_mas);
3377 return true;
3378 }
3379
3380 static noinline void mas_wr_spanning_rebalance(struct ma_state *mas,
3381 struct ma_wr_state *l_wr_mas, struct ma_wr_state *r_wr_mas)
3382 {
3383
3384 struct maple_enode *old_enode;
3385 struct maple_copy cp;
3386 struct ma_state sib;
3387
3388 cp_leaf_init(&cp, mas, l_wr_mas, r_wr_mas);
3389 do {
3390 spanning_data(&cp, l_wr_mas, r_wr_mas, &sib);
3391 multi_src_setup(&cp, l_wr_mas, r_wr_mas, &sib);
3392 dst_setup(&cp, mas, l_wr_mas->type);
3393 cp_data_write(&cp, mas);
3394 } while (spanning_ascend(&cp, mas, l_wr_mas, r_wr_mas, &sib));
3395
3396 old_enode = mas->node;
> 3397 mas->node = cp.slot[0];
3398 mas_wmb_replace(mas, old_enode, cp.height);
3399 mtree_range_walk(mas);
3400 }
3401
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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