[jimc:folio-pool-v2-lockdep 18/21] kernel/locking/lockdep.c:3877:28: error: 'chain_hlocks' undeclared; did you mean 'free_chain_hlocks'?

tree:   https://github.com/jimc/linux.git folio-pool-v2-lockdep
head:   e77ee8289ea0755b0ee299348504d4568f942d71
commit: 4530a53e6265de5abb7f5566fdb3d4fe0a7199c5 [18/21] locking/lockdep: Migrate chain_hlocks array to 2-level dynamic folio chunks
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20260818/[email protected]/config)
compiler: powerpc64-linux-gcc (GCC) 16.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260818/[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 errors (new ones prefixed by >>):

   In file included from kernel/locking/lockdep.c:84:
   kernel/locking/lockdep_internals.h: In function 'debug_class_ops_inc':
   kernel/locking/lockdep_internals.h:251:23: error: 'lock_classes' undeclared (first use in this function); did you mean 'lock_class'?
     251 |         idx = class - lock_classes;
         |                       ^~~~~~~~~~~~
         |                       lock_class
   kernel/locking/lockdep_internals.h:251:23: note: each undeclared identifier is reported only once for each function it appears in
   kernel/locking/lockdep_internals.h: In function 'debug_class_ops_read':
   kernel/locking/lockdep_internals.h:260:23: error: 'lock_classes' undeclared (first use in this function); did you mean 'lock_class'?
     260 |         idx = class - lock_classes;
         |                       ^~~~~~~~~~~~
         |                       lock_class
   kernel/locking/lockdep.c: In function 'print_chain_keys_chain':
>> kernel/locking/lockdep.c:3877:28: error: 'chain_hlocks' undeclared (first use in this function); did you mean 'free_chain_hlocks'?
    3877 |                 hlock_id = chain_hlocks[chain->base + i];
         |                            ^~~~~~~~~~~~
         |                            free_chain_hlocks
   In file included from include/linux/array_size.h:5,
                    from include/linux/string.h:6,
                    from arch/powerpc/include/asm/paca.h:16,
                    from arch/powerpc/include/asm/current.h:13,
                    from include/linux/mutex.h:14,
                    from kernel/locking/lockdep.c:30:
   kernel/locking/lockdep.c: In function 'check_no_collision':
   kernel/locking/lockdep.c:3935:41: error: 'chain_hlocks' undeclared (first use in this function); did you mean 'free_chain_hlocks'?
    3935 |                 if (DEBUG_LOCKS_WARN_ON(chain_hlocks[chain->base + j] != id)) {
         |                                         ^~~~~~~~~~~~
   include/linux/compiler.h:77:45: note: in definition of macro 'unlikely'
      77 | # define unlikely(x)    __builtin_expect(!!(x), 0)
         |                                             ^
   kernel/locking/lockdep.c:3935:21: note: in expansion of macro 'DEBUG_LOCKS_WARN_ON'
    3935 |                 if (DEBUG_LOCKS_WARN_ON(chain_hlocks[chain->base + j] != id)) {
         |                     ^~~~~~~~~~~~~~~~~~~
   kernel/locking/lockdep.c: At top level:
   kernel/locking/lockdep.c:1189:13: warning: 'in_any_zapped_class_list' defined but not used [-Wunused-function]
    1189 | static bool in_any_zapped_class_list(struct lock_class *class)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~


vim +3877 kernel/locking/lockdep.c

39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3868  
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3869  static void print_chain_keys_chain(struct lock_chain *chain)
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3870  {
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3871  	int i;
f6ec8829ac9d59 Yuyang Du                 2019-05-06  3872  	u64 chain_key = INITIAL_CHAIN_KEY;
f611e8cf98ec90 Boqun Feng                2020-08-07  3873  	u16 hlock_id;
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3874  
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3875  	printk("depth: %u\n", chain->depth);
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3876  	for (i = 0; i < chain->depth; i++) {
f611e8cf98ec90 Boqun Feng                2020-08-07 @3877  		hlock_id = chain_hlocks[chain->base + i];
f611e8cf98ec90 Boqun Feng                2020-08-07  3878  		chain_key = print_chain_key_iteration(hlock_id, chain_key);
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3879  
9e99b37a40c36a Jim Cromie                2026-08-17  3880  		print_lock_name(NULL, idx_to_lock_class(chain_hlock_class_idx(hlock_id)));
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3881  		printk("\n");
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3882  	}
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3883  }
39e2e173fb1f90 Alfredo Alvarez Fernandez 2016-03-30  3884  

:::::: The code at line 3877 was first introduced by commit
:::::: f611e8cf98ec908b9c2c0da6064a660fc6022487 lockdep: Take read/write status in consideration when generate chainkey

:::::: TO: Boqun Feng <[email protected]>
:::::: CC: Peter Zijlstra <[email protected]>

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