On Tue, May 26, 2020 at 09:11:17AM -0700, Paul E. McKenney wrote:
> On Tue, May 26, 2020 at 08:07:35PM +0800, kbuild test robot wrote:
> > tree:
> > https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
> > dev.2020.05.25a
> > head: 1e9451642683146552713c5ce6d269ae378eacd5
> > commit: 786a25497743696d79592b864cafbfe48787e6e1 [51/63] refperf: Add a
> > test to measure performance of read-side synchronization
> > config: x86_64-allyesconfig (attached as .config)
> > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project
> > 3393cc4cebf9969db94dc424b7a2b6195589c33b)
> > reproduce (this is a W=1 build):
> > wget
> > https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
> > ~/bin/make.cross
> > chmod +x ~/bin/make.cross
> > # install x86_64 cross compiling tool for clang build
> > # apt-get install binutils-x86-64-linux-gnu
> > git checkout 786a25497743696d79592b864cafbfe48787e6e1
> > # save the attached .config to linux build tree
> > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross
> > ARCH=x86_64
> >
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kbuild test robot <l...@intel.com>
> >
> > All warnings (new ones prefixed by >>, old ones prefixed by <<):
> >
> > >> kernel/rcu/refperf.c:298:6: warning: no previous prototype for function
> > >> 'reset_readers' [-Wmissing-prototypes]
> > void reset_readers(int n)
> > ^
> > kernel/rcu/refperf.c:298:1: note: declare 'static' if the function is not
> > intended to be used outside of this translation unit
> > void reset_readers(int n)
> > ^
> > static
> > >> kernel/rcu/refperf.c:311:5: warning: no previous prototype for function
> > >> 'process_durations' [-Wmissing-prototypes]
> > u64 process_durations(int n)
> > ^
> > kernel/rcu/refperf.c:311:1: note: declare 'static' if the function is not
> > intended to be used outside of this translation unit
> > u64 process_durations(int n)
> > ^
> > static
> > 2 warnings generated.
>
> Good catches, fixing!
>
> Thanx, Paul
Thanks in advance, Paul, for the fix!
- Joel
> > vim +/reset_readers +298 kernel/rcu/refperf.c
> >
> > 297
> > > 298 void reset_readers(int n)
> > 299 {
> > 300 int i;
> > 301 struct reader_task *rt;
> > 302
> > 303 for (i = 0; i < n; i++) {
> > 304 rt = &(reader_tasks[i]);
> > 305
> > 306 rt->last_duration_ns = 0;
> > 307 }
> > 308 }
> > 309
> > 310 // Print the results of each reader and return the sum of all
> > their durations.
> > > 311 u64 process_durations(int n)
> > 312 {
> > 313 int i;
> > 314 struct reader_task *rt;
> > 315 char buf1[64];
> > 316 char buf[512];
> > 317 u64 sum = 0;
> > 318
> > 319 buf[0] = 0;
> > 320 sprintf(buf, "Experiment #%d (Format:
> > <THREAD-NUM>:<Total loop time in ns>)",
> > 321 exp_idx);
> > 322
> > 323 for (i = 0; i <= n && !torture_must_stop(); i++) {
> > 324 rt = &(reader_tasks[i]);
> > 325 sprintf(buf1, "%d: %llu\t", i,
> > rt->last_duration_ns);
> > 326
> > 327 if (i % 5 == 0)
> > 328 strcat(buf, "\n");
> > 329 strcat(buf, buf1);
> > 330
> > 331 sum += rt->last_duration_ns;
> > 332 }
> > 333 strcat(buf, "\n");
> > 334
> > 335 PERFOUT("%s\n", buf);
> > 336
> > 337 return sum;
> > 338 }
> > 339
> >
> > ---
> > 0-DAY CI Kernel Test Service, Intel Corporation
> > https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
>
>
