tree: https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git arm64/preempt-dynamic-static-key head: 47c5f8b3abb64dcd6ac43521d24ca9e7d7891dcc commit: 47c5f8b3abb64dcd6ac43521d24ca9e7d7891dcc [6/6] arm64: support PREEMPT_DYNAMIC config: arm64-buildonly-randconfig-r004-20211118 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c46becf500df2a7fb4b4fce16178a036c344315a) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git/commit/?id... git remote add mark https://git.kernel.org/pub/scm/linux/kernel/git/mark/linux.git git fetch --no-tags mark arm64/preempt-dynamic-static-key git checkout 47c5f8b3abb64dcd6ac43521d24ca9e7d7891dcc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): torture_preempt_schedule(); /* Allow test to be preempted. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ kernel/locking/locktorture.c:122:3: note: did you mean 'preempt_schedule_irq'? include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ include/linux/sched.h:291:17: note: 'preempt_schedule_irq' declared here asmlinkage void preempt_schedule_irq(void); ^ kernel/locking/locktorture.c:170:3: error: implicit declaration of function 'preempt_schedule' [-Werror,-Wimplicit-function-declaration] torture_preempt_schedule(); /* Allow test to be preempted. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ kernel/locking/locktorture.c:349:3: error: implicit declaration of function 'preempt_schedule' [-Werror,-Wimplicit-function-declaration] torture_preempt_schedule(); /* Allow test to be preempted. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ kernel/locking/locktorture.c:524:3: error: implicit declaration of function 'preempt_schedule' [-Werror,-Wimplicit-function-declaration] torture_preempt_schedule(); /* Allow test to be preempted. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ kernel/locking/locktorture.c:564:3: error: implicit declaration of function 'preempt_schedule' [-Werror,-Wimplicit-function-declaration] torture_preempt_schedule(); /* Allow test to be preempted. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ kernel/locking/locktorture.c:591:3: error: implicit declaration of function 'preempt_schedule' [-Werror,-Wimplicit-function-declaration] torture_preempt_schedule(); /* Allow test to be preempted. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ 6 errors generated. -- torture_preempt_schedule(); /* QS only if preemptible. */ ^ include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ kernel/rcu/rcutorture.c:400:3: note: did you mean 'preempt_schedule_irq'? include/linux/torture.h:126:36: note: expanded from macro 'torture_preempt_schedule' #define torture_preempt_schedule() preempt_schedule() ^ include/linux/sched.h:291:17: note: 'preempt_schedule_irq' declared here asmlinkage void preempt_schedule_irq(void); ^ kernel/rcu/rcutorture.c:2051:5: error: implicit declaration of function 'preempt_schedule' [-Werror,-Wimplicit-function-declaration] preempt_schedule(); ^ 2 errors generated. vim +/preempt_schedule +122 kernel/locking/locktorture.c e086481baf9d04 Paul E. McKenney 2014-02-11 112 e086481baf9d04 Paul E. McKenney 2014-02-11 113 static void torture_lock_busted_write_delay(struct torture_random_state *trsp) e086481baf9d04 Paul E. McKenney 2014-02-11 114 { 61d49d2f9888ac Paul E. McKenney 2015-04-01 115 const unsigned long longdelay_ms = 100; e086481baf9d04 Paul E. McKenney 2014-02-11 116 e086481baf9d04 Paul E. McKenney 2014-02-11 117 /* We want a long delay occasionally to force massive contention. */ e086481baf9d04 Paul E. McKenney 2014-02-11 118 if (!(torture_random(trsp) % 61d49d2f9888ac Paul E. McKenney 2015-04-01 119 (cxt.nrealwriters_stress * 2000 * longdelay_ms))) 61d49d2f9888ac Paul E. McKenney 2015-04-01 120 mdelay(longdelay_ms); 630952c22b04ad Davidlohr Bueso 2014-09-11 121 if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000))) cc1321c96f8555 Paul E. McKenney 2017-10-16 @122 torture_preempt_schedule(); /* Allow test to be preempted. */ e086481baf9d04 Paul E. McKenney 2014-02-11 123 } e086481baf9d04 Paul E. McKenney 2014-02-11 124 :::::: The code at line 122 was first introduced by commit :::::: cc1321c96f855525fbd847fec130f000daa1bb1f torture: Reduce #ifdefs for preempt_schedule() :::::: TO: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com&gt; :::::: CC: Paul E. McKenney <paulmck(a)linux.vnet.ibm.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org