* Re: [PATCH] lkdtm: Add folio_lock deadlock scenarios
[not found] <20260402143947.162844-1-ysk@kzalloc.com>
@ 2026-04-07 4:00 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-04-07 4:00 UTC (permalink / raw)
To: Yunseong Kim, Kees Cook
Cc: llvm, oe-kbuild-all, Arnd Bergmann, Greg Kroah-Hartman,
linux-kernel, Peter Zijlstra, Ingo Molnar, Will Deacon,
Boqun Feng, Waiman Long, Shuah Khan, Tzung-Bi Shih, linux-mm,
linux-kselftest, max.byungchul.park, kernel_team@skhynix.com,
kernel-team, Yunseong Kim, Byungchul Park, Yeoreum Yun
Hi Yunseong,
kernel test robot noticed the following build warnings:
[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on char-misc/char-misc-next char-misc/char-misc-linus kees/for-next/pstore kees/for-next/kspp shuah-kselftest/next shuah-kselftest/fixes soc/for-next linus/master v7.0-rc6 next-20260403]
[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/Yunseong-Kim/lkdtm-Add-folio_lock-deadlock-scenarios/20260405-145013
base: char-misc/char-misc-testing
patch link: https://lore.kernel.org/r/20260402143947.162844-1-ysk%40kzalloc.com
patch subject: [PATCH] lkdtm: Add folio_lock deadlock scenarios
config: s390-randconfig-001-20260405 (https://download.01.org/0day-ci/archive/20260405/202604051803.UYvkxRXB-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c80443cd37b2e2788cba67ffa180a6331e5f0791)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260405/202604051803.UYvkxRXB-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/202604051803.UYvkxRXB-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/misc/lkdtm/deadlock.c:99:44: warning: omitting the parameter name in a function definition is a C23 extension [-Wc23-extensions]
99 | static int lkdtm_folio_mutex_kthread(void *)
| ^
drivers/misc/lkdtm/deadlock.c:112:44: warning: omitting the parameter name in a function definition is a C23 extension [-Wc23-extensions]
112 | static int lkdtm_mutex_folio_kthread(void *)
| ^
drivers/misc/lkdtm/deadlock.c:228:38: warning: omitting the parameter name in a function definition is a C23 extension [-Wc23-extensions]
228 | static int lkdtm_waiter_thread(void *)
| ^
3 warnings generated.
vim +99 drivers/misc/lkdtm/deadlock.c
97
98 /* Attempting 'folio_lock() A then Mutex B' order */
> 99 static int lkdtm_folio_mutex_kthread(void *)
100 {
101 while (true) {
102 folio_lock(folio_common);
103 mutex_lock(&mutex_b);
104 mutex_unlock(&mutex_b);
105 folio_unlock(folio_common);
106 }
107
108 return 0;
109 }
110
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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