[jimc:m-4 143/145] kernel/locking/lockdep.c:65:27: warning: 'lockdep_arena' defined but not used

tree:   https://github.com/jimc/linux.git m-4
head:   0036927f87d51d733bf100cae4e407fa21a2c3a6
commit: 42d80a3bc4214d8c2da60cf229926307ce4d78a4 [143/145] include/linux/folio_arena.h: Add !CONFIG_DYNAMIC_DEBUG_CORE stubs
config: sparc-randconfig-r073-20260813 (https://download.01.org/0day-ci/archive/20260814/[email protected]/config)
compiler: sparc64-linux-gcc (GCC) 11.5.0
smatch: v0.5.0-9187-g5189e3fb
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260814/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All warnings (new ones prefixed by >>):

>> kernel/locking/lockdep.c:65:27: warning: 'lockdep_arena' defined but not used [-Wunused-variable]
      65 | static struct folio_arena lockdep_arena =
         |                           ^~~~~~~~~~~~~


vim +/lockdep_arena +65 kernel/locking/lockdep.c

fbb9ce9530fd9b kernel/lockdep.c         Ingo Molnar 2006-07-03  64  
9bf38cbfe77419 kernel/locking/lockdep.c Jim Cromie  2026-08-11 @65  static struct folio_arena lockdep_arena =
9bf38cbfe77419 kernel/locking/lockdep.c Jim Cromie  2026-08-11  66  	FOLIO_ARENA_INIT(lockdep_arena, sizeof(struct lock_list), 4);
9bf38cbfe77419 kernel/locking/lockdep.c Jim Cromie  2026-08-11  67  

:::::: The code at line 65 was first introduced by commit
:::::: 9bf38cbfe7741920b9ff7383eb840f7a70254f2c locking/lockdep: Fallback to folio_arena in alloc_list_entry when static pool is full

:::::: TO: Jim Cromie <[email protected]>
:::::: CC: Jim Cromie <[email protected]>

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