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
Uk-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 14.2.0
reproduce:
(https://download.01.org/0day-ci/archive/20250217/202502170630.xSYE4c
Uk-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

quoted

Reported-by: kernel test robot <redacted>
Closes:
https://lore.kernel.org/oe-kbuild-all/202502170630.xSYE4cUk-lkp@intel.com/ (local)

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:

quoted

quoted

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,
         | ^~~~~~~~~~~~~~~~~~~

quoted

quoted

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,
         | ^~~~~~~~~~~~~~~~~~~

quoted

quoted

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,
         | ^~~~~~~~~~~~~~~~~~~

quoted

quoted

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.