On Mon, 2025-02-17 at 06:39 +0800, kernel test robot wrote: > Hi Gabriele, > > kernel test robot noticed the following build warnings: > > [auto build test WARNING on 4dc1d1bec89864d8076e5ab314f86f46442bfb02] > > url: > https://github.com/intel-lab-lkp/linux/commits/Gabriele-Monaco/tracing-Fix-DECLARE_TRACE_CONDITION/20250213-171642 > base: 4dc1d1bec89864d8076e5ab314f86f46442bfb02 > patch link: > https://lore.kernel.org/r/20250213090819.419470-5-gmonaco%40redhat.com > patch subject: [PATCH v2 04/11] rv: Add option for nested monitors > and include sched > config: parisc-randconfig-r112-20250217 > (https://download.01.org/0day-ci/archive/20250217/202502170630.xSYE4c > [email protected]/config) > compiler: hppa-linux-gcc (GCC) 14.2.0 > reproduce: > (https://download.01.org/0day-ci/archive/20250217/202502170630.xSYE4c > [email protected]/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 <[email protected]> > > Closes: > > https://lore.kernel.org/oe-kbuild-all/[email protected]/ > > All warnings (new ones prefixed by >>): > > In file included from include/trace/define_trace.h:119, > from kernel/trace/rv/rv_trace.h:130, > from kernel/trace/rv/rv.c:148: > > > include/trace/trace_events.h:477:13: warning: > > > 'print_fmt_error_da_monitor' defined but not used [-Wunused- > > > variable] > 477 | static char print_fmt_##call[] = > print; \ > | ^~~~~~~~~~ > kernel/trace/rv/./rv_trace.h:39:1: note: in expansion of macro > 'DECLARE_EVENT_CLASS' > 39 | DECLARE_EVENT_CLASS(error_da_monitor, > | ^~~~~~~~~~~~~~~~~~~ > > > include/trace/trace_events.h:477:13: warning: > > > 'print_fmt_event_da_monitor' defined but not used [-Wunused- > > > variable] > 477 | static char print_fmt_##call[] = > print; \ > | ^~~~~~~~~~ > kernel/trace/rv/./rv_trace.h:12:1: note: in expansion of macro > 'DECLARE_EVENT_CLASS' > 12 | DECLARE_EVENT_CLASS(event_da_monitor, > | ^~~~~~~~~~~~~~~~~~~ > > > include/trace/trace_events.h:223:37: warning: > > > 'trace_event_type_funcs_error_da_monitor' defined but not used [- > > > Wunused-variable] > 223 | static struct trace_event_functions > trace_event_type_funcs_##call = { \ > | > ^~~~~~~~~~~~~~~~~~~~~~~ > kernel/trace/rv/./rv_trace.h:39:1: note: in expansion of macro > 'DECLARE_EVENT_CLASS' > 39 | DECLARE_EVENT_CLASS(error_da_monitor, > | ^~~~~~~~~~~~~~~~~~~ > > > include/trace/trace_events.h:223:37: warning: > > > 'trace_event_type_funcs_event_da_monitor' defined but not used [- > > > Wunused-variable] > 223 | static struct trace_event_functions > trace_event_type_funcs_##call = { \ > | > ^~~~~~~~~~~~~~~~~~~~~~~ > kernel/trace/rv/./rv_trace.h:12:1: note: in expansion of macro > 'DECLARE_EVENT_CLASS' > 12 | DECLARE_EVENT_CLASS(event_da_monitor, > | ^~~~~~~~~~~~~~~~~~~ >
This is something hard to trigger, but I didn't remove the select DA_MON_EVENTS_IMPLICIT in RV_MON_SCHED . As a result if the user enables the sched monitor without any nested monitor (which is already a broken configuration but happens if you apply this commit without the following ones) trace event classes would be created with no event using them. I will send a V2 with the fix.
