[koverstreet-bcachefs:bcachefs-testing 110/113] fs/bcachefs/btree_cache.c:190:22: warning: unused variable 'bc'

[koverstreet-bcachefs:bcachefs-testing 110/113] fs/bcachefs/btree_cache.c:190:22: warning: unused variable 'bc'

[kernel test robot]

tree:   https://github.com/koverstreet/bcachefs bcachefs-testing
head:   869fe6267c3286b53f85effa38ab83a6200fd49b
commit: ace9e99ba674c601f71218613ecfec44976becfc [110/113] bcachefs: Tweak btree cache helpers for use by btree node scan
config: arc-randconfig-2002-20250704 (https://download.01.org/0day-ci/archive/20250704/202507040501.Ap74GJO2-lkp@intel.com/config)
compiler: arc-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250704/202507040501.Ap74GJO2-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/202507040501.Ap74GJO2-lkp@intel.com/

All warnings (new ones prefixed by >>):

   fs/bcachefs/btree_cache.c: In function '__bch2_btree_node_mem_alloc':
>> fs/bcachefs/btree_cache.c:190:22: warning: unused variable 'bc' [-Wunused-variable]
     190 |  struct btree_cache *bc = &c->btree_cache;
         |                      ^~


vim +/bc +190 fs/bcachefs/btree_cache.c

4580baec7fbee2 Kent Overstreet 2020-07-25  187  
6adaac0b95dd39 Kent Overstreet 2021-04-20  188  struct btree *__bch2_btree_node_mem_alloc(struct bch_fs *c)
4580baec7fbee2 Kent Overstreet 2020-07-25  189  {
4580baec7fbee2 Kent Overstreet 2020-07-25 @190  	struct btree_cache *bc = &c->btree_cache;
a10195764901e0 Kent Overstreet 2022-10-22  191  	struct btree *b;
a10195764901e0 Kent Overstreet 2022-10-22  192  
a10195764901e0 Kent Overstreet 2022-10-22  193  	b = __btree_node_mem_alloc(c, GFP_KERNEL);
4580baec7fbee2 Kent Overstreet 2020-07-25  194  	if (!b)
4580baec7fbee2 Kent Overstreet 2020-07-25  195  		return NULL;
1c6fdbd8f2465d Kent Overstreet 2017-03-16  196  
4580baec7fbee2 Kent Overstreet 2020-07-25  197  	if (btree_node_data_alloc(c, b, GFP_KERNEL)) {
4580baec7fbee2 Kent Overstreet 2020-07-25  198  		kfree(b);
4580baec7fbee2 Kent Overstreet 2020-07-25  199  		return NULL;
4580baec7fbee2 Kent Overstreet 2020-07-25  200  	}
4580baec7fbee2 Kent Overstreet 2020-07-25  201  
677bdb7346b6fd Alan Huang      2025-02-26  202  	bch2_btree_lock_init(&b->c, 0, GFP_KERNEL);
4580baec7fbee2 Kent Overstreet 2020-07-25  203  	return b;
1c6fdbd8f2465d Kent Overstreet 2017-03-16  204  }
1c6fdbd8f2465d Kent Overstreet 2017-03-16  205  

:::::: The code at line 190 was first introduced by commit
:::::: 4580baec7fbee2fdceb9b5b2b337ea3734a6d2b8 bcachefs: Remove some uses of PAGE_SIZE in the btree code

:::::: TO: Kent Overstreet <kent.overstreet@gmail.com>
:::::: CC: Kent Overstreet <kent.overstreet@linux.dev>

-- 
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https://github.com/intel/lkp-tests/wiki