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charset=us-ascii tree: https://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git b4/auxclock-nanosleep head: 90614b63ef6a2f10b6e486e486ca8d5bfd2b7a81 commit: 3d3535e426c8e15bef8f2b193de5a970bbc84a20 [1/28] debugging config: powerpc-adder875_defconfig (https://download.01.org/0day-ci/archive/20260121/202601211003.aAKWT2re-lkp@intel.com/config) compiler: powerpc-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260121/202601211003.aAKWT2re-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 | Closes: https://lore.kernel.org/oe-kbuild-all/202601211003.aAKWT2re-lkp@intel.com/ All errors (new ones prefixed by >>): powerpc-linux-ld: kernel/fork.o: in function `free_task': >> kernel/fork.c:549:(.text+0x1f28): undefined reference to `rt_mutex_debug_task_free' Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for DEBUG_RT_MUTEXES Depends on [n]: DEBUG_KERNEL [=y] && RT_MUTEXES [=n] Selected by [y]: - DEBUG_TIMERS [=y] vim +549 kernel/fork.c 68f24b08ee892d Andy Lutomirski 2016-09-15 527 68f24b08ee892d Andy Lutomirski 2016-09-15 528 void free_task(struct task_struct *tsk) 68f24b08ee892d Andy Lutomirski 2016-09-15 529 { a1140cb215fa13 Kuniyuki Iwashima 2022-08-23 530 #ifdef CONFIG_SECCOMP a1140cb215fa13 Kuniyuki Iwashima 2022-08-23 531 WARN_ON_ONCE(tsk->seccomp.filter); a1140cb215fa13 Kuniyuki Iwashima 2022-08-23 532 #endif b90ca8badbd114 Will Deacon 2021-07-30 533 release_user_cpus_ptr(tsk); d08b9f0ca6605e Sami Tolvanen 2020-04-27 534 scs_release(tsk); d08b9f0ca6605e Sami Tolvanen 2020-04-27 535 68f24b08ee892d Andy Lutomirski 2016-09-15 536 #ifndef CONFIG_THREAD_INFO_IN_TASK 68f24b08ee892d Andy Lutomirski 2016-09-15 537 /* 68f24b08ee892d Andy Lutomirski 2016-09-15 538 * The task is finally done with both the stack and thread_info, 68f24b08ee892d Andy Lutomirski 2016-09-15 539 * so free both. 68f24b08ee892d Andy Lutomirski 2016-09-15 540 */ 68f24b08ee892d Andy Lutomirski 2016-09-15 541 release_task_stack(tsk); 68f24b08ee892d Andy Lutomirski 2016-09-15 542 #else 68f24b08ee892d Andy Lutomirski 2016-09-15 543 /* 68f24b08ee892d Andy Lutomirski 2016-09-15 544 * If the task had a separate stack allocation, it should be gone 68f24b08ee892d Andy Lutomirski 2016-09-15 545 * by now. 68f24b08ee892d Andy Lutomirski 2016-09-15 546 */ f0b89d3958d73c Elena Reshetova 2019-01-18 547 WARN_ON_ONCE(refcount_read(&tsk->stack_refcount) != 0); 68f24b08ee892d Andy Lutomirski 2016-09-15 548 #endif 23f78d4a03c53c Ingo Molnar 2006-06-27 @549 rt_mutex_debug_task_free(tsk); fb52607afcd062 Frederic Weisbecker 2008-11-25 550 ftrace_graph_exit_task(tsk); f19b9f74b7ea3b Akinobu Mita 2012-07-30 551 arch_release_task_struct(tsk); 1da5c46fa965ff Oleg Nesterov 2016-11-29 552 if (tsk->flags & PF_KTHREAD) 1da5c46fa965ff Oleg Nesterov 2016-11-29 553 free_kthread_struct(tsk); b0fd1852bcc21a KP Singh 2023-06-02 554 bpf_task_storage_free(tsk); ^1da177e4c3f41 Linus Torvalds 2005-04-16 555 free_task_struct(tsk); ^1da177e4c3f41 Linus Torvalds 2005-04-16 556 } ^1da177e4c3f41 Linus Torvalds 2005-04-16 557 EXPORT_SYMBOL(free_task); ^1da177e4c3f41 Linus Torvalds 2005-04-16 558 :::::: The code at line 549 was first introduced by commit :::::: 23f78d4a03c53cbd75d87a795378ea540aa08c86 [PATCH] pi-futex: rt mutex core :::::: TO: Ingo Molnar :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki