[ammarfaizi2-block:dhowells/linux-fs/netfs-maple 19/40] lib/maple_tree.c:4203:20: warning: stack frame size (1288) exceeds limit (1024) in 'mas_wr_modify'

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/netfs-maple
head:   674eea41fc70a740ff83ec590f9833f805852464
commit: 51b63e667ad83864c161cf2b8ef462e907536070 [19/40] Maple Tree: Add new data structure
config: arm-moxart_defconfig (https://download.01.org/0day-ci/archive/20220405/202204051827.GTlRliPg-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c4a1b07d0979e7ff20d7d541af666d822d66b566)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/ammarfaizi2/linux-block/commit/51b63e667ad83864c161cf2b8ef462e907536070
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/netfs-maple
        git checkout 51b63e667ad83864c161cf2b8ef462e907536070
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   lib/maple_tree.c:758:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
           case maple_dense:
           ^
   lib/maple_tree.c:758:2: note: insert 'break;' to avoid fall-through
           case maple_dense:
           ^
           break; 
   lib/maple_tree.c:5556:6: warning: no previous prototype for function 'mas_wr_store_setup' [-Wmissing-prototypes]
   void mas_wr_store_setup(struct ma_wr_state *wr_mas)
        ^
   lib/maple_tree.c:5556:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void mas_wr_store_setup(struct ma_wr_state *wr_mas)
   ^
   static 
   lib/maple_tree.c:6184:5: warning: no previous prototype for function 'mtree_alloc_range' [-Wmissing-prototypes]
   int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp,
       ^
   lib/maple_tree.c:6184:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int mtree_alloc_range(struct maple_tree *mt, unsigned long *startp,
   ^
   static 
   lib/maple_tree.c:6219:5: warning: no previous prototype for function 'mtree_alloc_rrange' [-Wmissing-prototypes]
   int mtree_alloc_rrange(struct maple_tree *mt, unsigned long *startp,
       ^
   lib/maple_tree.c:6219:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int mtree_alloc_rrange(struct maple_tree *mt, unsigned long *startp,
   ^
   static 
   lib/maple_tree.c:76:28: warning: unused variable 'mt_max' [-Wunused-const-variable]
   static const unsigned long mt_max[] = {
                              ^
   lib/maple_tree.c:317:20: warning: unused function 'mte_set_full' [-Wunused-function]
   static inline void mte_set_full(const struct maple_enode *node)
                      ^
   lib/maple_tree.c:322:20: warning: unused function 'mte_clear_full' [-Wunused-function]
   static inline void mte_clear_full(const struct maple_enode *node)
                      ^
   lib/maple_tree.c:832:35: warning: unused function 'mas_get_slot' [-Wunused-function]
   static inline struct maple_enode *mas_get_slot(struct ma_state *mas,
                                     ^
   lib/maple_tree.c:4608:19: warning: unused function 'mas_dead_node' [-Wunused-function]
   static inline int mas_dead_node(struct ma_state *mas, unsigned long index)
                     ^
   lib/maple_tree.c:4630:21: warning: unused function 'mas_first_entry' [-Wunused-function]
   static inline void *mas_first_entry(struct ma_state *mas, struct maple_node *mn,
                       ^
   lib/maple_tree.c:3863:19: warning: stack frame size (1040) exceeds limit (1024) in 'mas_wr_spanning_store' [-Wframe-larger-than]
   static inline int mas_wr_spanning_store(struct ma_wr_state *wr_mas)
                     ^
>> lib/maple_tree.c:4203:20: warning: stack frame size (1288) exceeds limit (1024) in 'mas_wr_modify' [-Wframe-larger-than]
   static inline void mas_wr_modify(struct ma_wr_state *wr_mas)
                      ^
   12 warnings generated.


vim +/mas_wr_modify +4203 lib/maple_tree.c

  4202	
> 4203	static inline void mas_wr_modify(struct ma_wr_state *wr_mas)
  4204	{
  4205		unsigned char zero;
  4206		unsigned char node_slots;
  4207		struct ma_state *mas = wr_mas->mas;
  4208		struct maple_big_node b_node;
  4209	
  4210		/* Direct replacement */
  4211		if (wr_mas->r_min == mas->index && wr_mas->r_max == mas->last) {
  4212			rcu_assign_pointer(wr_mas->slots[mas->offset], wr_mas->entry);
  4213			if (!!wr_mas->entry ^ !!wr_mas->content)
  4214				mas_update_gap(mas);
  4215			return;
  4216		}
  4217	
  4218		/* Attempt to append */
  4219		node_slots = mt_slots[wr_mas->type];
  4220		/* slot and node store will not fit, go to the slow path */
  4221		if (unlikely(wr_mas->offset_end + 1 >= node_slots))
  4222			goto slow_path;
  4223	
  4224		if (wr_mas->entry && (wr_mas->node_end < node_slots - 1) &&
  4225		    (mas->offset == wr_mas->node_end) && mas_wr_append(wr_mas)) {
  4226				if (!wr_mas->content || !wr_mas->entry)
  4227					mas_update_gap(mas);
  4228				return;
  4229		}
  4230	
  4231		if ((wr_mas->offset_end - mas->offset <= 1) && mas_wr_slot_store(wr_mas))
  4232			return;
  4233		else if (mas_wr_node_store(wr_mas))
  4234			return;
  4235	
  4236		if (mas_is_err(mas))
  4237			return;
  4238	
  4239	slow_path:
  4240		b_node.b_end = mas_store_b_node(wr_mas, &b_node, wr_mas->offset_end);
  4241		b_node.min = mas->min;
  4242		zero = MAPLE_BIG_NODE_SLOTS - b_node.b_end - 1;
  4243		memset(b_node.slot + b_node.b_end + 1, 0, sizeof(void *) * zero--);
  4244		memset(b_node.pivot + b_node.b_end + 1, 0,
  4245		       sizeof(unsigned long) * zero);
  4246	
  4247		trace_ma_write(__func__, mas, 0, wr_mas->entry);
  4248		mas_commit_b_node(mas, &b_node, wr_mas->node_end);
  4249	}
  4250	

-- 
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