Re: [RFC PATCH] tracing: Merge irqflags + preemt counter, add RT bits

[kernel test robot <lkp@intel.com>]

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Hi Sebastian,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on next-20201215]
[cannot apply to tip/perf/core linux/master block/for-next trace/for-next linus/master v5.10 v5.10-rc7 v5.10-rc6 v5.10]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Sebastian-Andrzej-Siewior/tracing-Merge-irqflags-preemt-counter-add-RT-bits/20201217-012430
base:    9317f948b0b188b8d2fded75957e6d42c460df1b
config: openrisc-randconfig-s031-20201216 (attached as .config)
compiler: or1k-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-184-g1b896707-dirty
        # https://github.com/0day-ci/linux/commit/afd5d9090ab105dae5830c2f050a30ec306d7201
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Sebastian-Andrzej-Siewior/tracing-Merge-irqflags-preemt-counter-add-RT-bits/20201217-012430
        git checkout afd5d9090ab105dae5830c2f050a30ec306d7201
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=openrisc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   kernel/trace/trace.c: In function '__trace_puts':
   kernel/trace/trace.c:1001:6: warning: variable 'pc' set but not used [-Wunused-but-set-variable]
    1001 |  int pc;
         |      ^~
   kernel/trace/trace.c: In function '__trace_bputs':
   kernel/trace/trace.c:1056:6: warning: variable 'pc' set but not used [-Wunused-but-set-variable]
    1056 |  int pc;
         |      ^~
   kernel/trace/trace.c: At top level:
   kernel/trace/trace.c:3147:13: error: conflicting types for 'ftrace_trace_userstack'
    3147 | static void ftrace_trace_userstack(struct trace_array *tr,
         |             ^~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/trace.c:166:13: note: previous declaration of 'ftrace_trace_userstack' was here
     166 | static void ftrace_trace_userstack(struct trace_array *tr,
         |             ^~~~~~~~~~~~~~~~~~~~~~
>> kernel/trace/trace.c:166:13: warning: 'ftrace_trace_userstack' used but never defined
   kernel/trace/trace.c:3147:13: warning: 'ftrace_trace_userstack' defined but not used [-Wunused-function]
    3147 | static void ftrace_trace_userstack(struct trace_array *tr,
         |             ^~~~~~~~~~~~~~~~~~~~~~
   kernel/trace/trace.c:1675:37: warning: 'tracing_max_lat_fops' defined but not used [-Wunused-const-variable=]
    1675 | static const struct file_operations tracing_max_lat_fops;
         |                                     ^~~~~~~~~~~~~~~~~~~~


vim +/ftrace_trace_userstack +166 kernel/trace/trace.c

9828413d4715d4e Steven Rostedt (Red Hat   2015-03-31  164) 
9c5b9d3d65e4858 Masami Hiramatsu          2020-01-11  165  int tracing_set_tracer(struct trace_array *tr, const char *buf);
bcee5278958802b Steven Rostedt (VMware    2020-12-04 @166) static void ftrace_trace_userstack(struct trace_array *tr,
bcee5278958802b Steven Rostedt (VMware    2020-12-04  167) 				   struct trace_buffer *buffer,
afd5d9090ab105d Sebastian Andrzej Siewior 2020-12-16  168  				   unsigned int trace_ctx);
b2821ae68b14480 Steven Rostedt            2009-02-02  169  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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