From: kernel test robot <lkp@intel.com>
To: "Jim Cromie" <jim.cromie@gmail.com>,
" Łukasz Bartosik" <ukaszb@chromium.org>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [jimc:folio-pool-v2-lockdep 16/21] kernel/locking/lockdep_internals.h:248:16: error: use of undeclared identifier 'lock_classes'; did you mean 'nr_lock_classes'?
Date: Wed, 19 Aug 2026 00:59:45 +0800 [thread overview]
Message-ID: <202608190057.bYkKmEhm-lkp@intel.com> (raw)
tree: https://github.com/jimc/linux.git folio-pool-v2-lockdep
head: e77ee8289ea0755b0ee299348504d4568f942d71
commit: 9e99b37a40c36adbf813b758582f9b57aa5e41e3 [16/21] locking/lockdep: Migrate lock_classes array to 2-level dynamic folio chunks
config: powerpc-randconfig-002-20260818 (https://download.01.org/0day-ci/archive/20260819/202608190057.bYkKmEhm-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 844a18e753e822736c9805ab779144b647a2c186)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260819/202608190057.bYkKmEhm-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/202608190057.bYkKmEhm-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from kernel/locking/lockdep.c:84:
>> kernel/locking/lockdep_internals.h:248:16: error: use of undeclared identifier 'lock_classes'; did you mean 'nr_lock_classes'?
248 | idx = class - lock_classes;
| ^~~~~~~~~~~~
| nr_lock_classes
kernel/locking/lockdep_internals.h:139:22: note: 'nr_lock_classes' declared here
139 | extern unsigned long nr_lock_classes;
| ^
>> kernel/locking/lockdep_internals.h:248:6: error: incompatible pointer to integer conversion assigning to 'int' from 'struct lock_class *' [-Wint-conversion]
248 | idx = class - lock_classes;
| ^ ~~~~~~~~~~~~~~~~~~~~
kernel/locking/lockdep_internals.h:257:16: error: use of undeclared identifier 'lock_classes'; did you mean 'nr_lock_classes'?
257 | idx = class - lock_classes;
| ^~~~~~~~~~~~
| nr_lock_classes
kernel/locking/lockdep_internals.h:139:22: note: 'nr_lock_classes' declared here
139 | extern unsigned long nr_lock_classes;
| ^
kernel/locking/lockdep_internals.h:257:6: error: incompatible pointer to integer conversion assigning to 'int' from 'struct lock_class *' [-Wint-conversion]
257 | idx = class - lock_classes;
| ^ ~~~~~~~~~~~~~~~~~~~~
4 errors generated.
vim +248 kernel/locking/lockdep_internals.h
8ca2b56cd7da98 Waiman Long 2018-10-03 243
8ca2b56cd7da98 Waiman Long 2018-10-03 244 static inline void debug_class_ops_inc(struct lock_class *class)
8ca2b56cd7da98 Waiman Long 2018-10-03 245 {
8ca2b56cd7da98 Waiman Long 2018-10-03 246 int idx;
8ca2b56cd7da98 Waiman Long 2018-10-03 247
8ca2b56cd7da98 Waiman Long 2018-10-03 @248 idx = class - lock_classes;
8ca2b56cd7da98 Waiman Long 2018-10-03 249 __debug_atomic_inc(lock_class_ops[idx]);
8ca2b56cd7da98 Waiman Long 2018-10-03 250 }
8ca2b56cd7da98 Waiman Long 2018-10-03 251
:::::: The code at line 248 was first introduced by commit
:::::: 8ca2b56cd7da98fc8f8d787bb706b9d6c8674a3b locking/lockdep: Make class->ops a percpu counter and move it under CONFIG_DEBUG_LOCKDEP=y
:::::: TO: Waiman Long <longman@redhat.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-08-18 17:00 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202608190057.bYkKmEhm-lkp@intel.com \
--to=lkp@intel.com \
--cc=jim.cromie@gmail.com \
--cc=oe-kbuild-all@lists.linux.dev \
--cc=ukaszb@chromium.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.