Hi Paul, [auto build test ERROR on tip/perf/core] [also build test ERROR on v4.11-rc5 next-20170406] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Steven-Rostedt/tracing-Add-usecase-of-synchronize_rcu_tasks-and-stack_tracer_disable/20170407-122352 config: x86_64-randconfig-x009-201714 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): kernel/rcu/tree.c: In function 'rcu_eqs_enter_common': >> kernel/rcu/tree.c:806:2: error: implicit declaration of function >> 'stack_tracer_enable' [-Werror=implicit-function-declaration] stack_tracer_enable(); ^~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/stack_tracer_enable +806 kernel/rcu/tree.c 800 do_nocb_deferred_wakeup(rdp); 801 } 802 rcu_prepare_for_idle(); 803 stack_tracer_disable(); 804 rdtp->dynticks_nesting = 0; /* Breaks tracing momentarily. */ 805 rcu_dynticks_eqs_enter(); /* After this, tracing works again. */ > 806 stack_tracer_enable(); 807 rcu_dynticks_task_enter(); 808 809 /* --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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