[vbabka:maple-tree-sheaves-v3-hack 19/21] lib/maple_tree.c:6481:30: sparse: sparse: incorrect type in assignment (different address spaces)

[vbabka:maple-tree-sheaves-v3-hack 19/21] lib/maple_tree.c:6481:30: sparse: sparse: incorrect type in assignment (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git maple-tree-sheaves-v3-hack
head:   9b7a825f40a76d8502c0e96c19cfd47c53d8bd4d
commit: 0cf12ebfec24f08ea972ca4a28b71f0b212388e0 [19/21] maple_tree: Convert forking to use the sheaf interface
config: hexagon-randconfig-r113-20250210 (https://download.01.org/0day-ci/archive/20250210/202502102217.0YW7bpVS-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce: (https://download.01.org/0day-ci/archive/20250210/202502102217.0YW7bpVS-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202502102217.0YW7bpVS-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> lib/maple_tree.c:6481:30: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __rcu * @@     got struct maple_node * @@
   lib/maple_tree.c:6481:30: sparse:     expected void [noderef] __rcu *
   lib/maple_tree.c:6481:30: sparse:     got struct maple_node *
>> lib/maple_tree.c:6481:30: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __rcu * @@     got struct maple_node * @@
   lib/maple_tree.c:6481:30: sparse:     expected void [noderef] __rcu *
   lib/maple_tree.c:6481:30: sparse:     got struct maple_node *

vim +6481 lib/maple_tree.c

  6448	
  6449	/*
  6450	 * mas_dup_alloc() - Allocate child nodes for a maple node.
  6451	 * @mas: The maple state of source tree.
  6452	 * @new_mas: The maple state of new tree.
  6453	 * @gfp: The GFP_FLAGS to use for allocations.
  6454	 *
  6455	 * This function allocates child nodes for @new_mas->node during the duplication
  6456	 * process. If memory allocation fails, @mas is set to -ENOMEM.
  6457	 */
  6458	static inline void mas_dup_alloc(struct ma_state *mas, struct ma_state *new_mas,
  6459			gfp_t gfp)
  6460	{
  6461		struct maple_node *node = mte_to_node(mas->node);
  6462		struct maple_node *new_node = mte_to_node(new_mas->node);
  6463		enum maple_type type;
  6464		unsigned char count, i;
  6465		void __rcu **slots;
  6466		void __rcu **new_slots;
  6467		unsigned long val;
  6468	
  6469		/* Allocate memory for child nodes. */
  6470		type = mte_node_type(mas->node);
  6471		new_slots = ma_slots(new_node, type);
  6472		count = mas->node_request = mas_data_end(mas) + 1;
  6473		mas_alloc_nodes(mas, gfp);
  6474		if (unlikely(mas_is_err(mas)))
  6475			return;
  6476	
  6477		slots = ma_slots(node, type);
  6478		for (i = 0; i < count; i++) {
  6479			val = (unsigned long)mt_slot_locked(mas->tree, slots, i);
  6480			val &= MAPLE_NODE_MASK;
> 6481			new_slots[i] = ma_mnode_ptr((unsigned long)mas_pop_node(mas) |
  6482						    val);
  6483		}
  6484	}
  6485	

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