tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git fix/wchan/leaky head: 62ba17f8f461578402c62e7cc2318443a262cc3b commit: 26a28d75580ddecc5d085def97bbd76c4f60f0a3 [5/6] x86: Fix get_wchan() to support the ORC unwinder config: x86_64-alldefconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id... git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git git fetch --no-tags kees fix/wchan/leaky git checkout 26a28d75580ddecc5d085def97bbd76c4f60f0a3 # save the attached .config to linux build tree make W=1 ARCH=x86_64 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 >>): arch/x86/kernel/process.c: In function 'get_wchan': 952 | stack_trace_save_tsk(p, &entry, 1, 0); | ^~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/stack_trace_save_tsk +952 arch/x86/kernel/process.c 938 939 /* 940 * Called from fs/proc with a reference on @p to find the function 941 * which called into schedule(). This needs to be done carefully 942 * because the task might wake up and we might look at a stack 943 * changing under us. 944 */ 945 unsigned long get_wchan(struct task_struct *p) 946 { 947 unsigned long entry = 0; 948 949 if (p == current || task_is_running(p)) 950 return 0; 951 953 return entry; 954 } 955 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org