Re: [PATCH] btrfs: edits tree_insert() to use rb helpers

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

Hi Roger,

kernel test robot noticed the following build errors:

[auto build test ERROR on kdave/for-next]
[also build test ERROR on linus/master v6.13-rc2 next-20241206]
[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/Roger-L-Beckermeyer-III/btrfs-edits-tree_insert-to-use-rb-helpers/20241209-064230
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-next
patch link:    https://lore.kernel.org/r/5e023dcf8f086296da987f8ba2b43be0aca15b86.1733695544.git.beckerlee3%40gmail.com
patch subject: [PATCH] btrfs: edits tree_insert() to use rb helpers
config: i386-buildonly-randconfig-003-20241209 (https://download.01.org/0day-ci/archive/20241209/202412091004.4vQ7P5Kl-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241209/202412091004.4vQ7P5Kl-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/202412091004.4vQ7P5Kl-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from fs/btrfs/delayed-ref.c:10:
   In file included from fs/btrfs/ctree.h:10:
   In file included from include/linux/pagemap.h:8:
   In file included from include/linux/mm.h:2223:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> fs/btrfs/delayed-ref.c:342:10: error: call to undeclared function 'rb_find_add_cached'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     342 |         exist = rb_find_add_cached(node, root, comp_refs_node);
         |                 ^
>> fs/btrfs/delayed-ref.c:342:8: error: incompatible integer to pointer conversion assigning to 'struct rb_node *' from 'int' [-Wint-conversion]
     342 |         exist = rb_find_add_cached(node, root, comp_refs_node);
         |               ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning and 2 errors generated.


vim +/rb_find_add_cached +342 fs/btrfs/delayed-ref.c

   334	
   335	static struct btrfs_delayed_ref_node* tree_insert(struct rb_root_cached *root,
   336			struct btrfs_delayed_ref_node *ins)
   337	{
   338		struct rb_node *node = &ins->ref_node;
   339		struct rb_node *exist;
   340		struct btrfs_delayed_ref_node *entry;
   341	
 > 342		exist = rb_find_add_cached(node, root, comp_refs_node);
   343		if (exist != NULL) {
   344			entry = rb_entry(exist, struct btrfs_delayed_ref_node, ref_node);
   345			return entry;
   346		}
   347		return NULL;
   348	}
   349	

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