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Tue, 15 Mar 2022 13:25:54 +0000 Date: Tue, 15 Mar 2022 21:24:58 +0800 From: kernel test robot To: Ingo Molnar Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [mingo-tip:sched/core 16/16] kernel/sched/loadavg.c:245:6: warning: no previous prototype for 'calc_load_nohz_start' Message-ID: <202203152144.uFQqgVUf-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/core head: 4ff8f2ca6ccd9e0cc5665d09f86d631b3ae3a14c commit: 4ff8f2ca6ccd9e0cc5665d09f86d631b3ae3a14c [16/16] sched/headers: Reorganize, clean up and optimize kernel/sched/sched.h dependencies config: nios2-defconfig (https://download.01.org/0day-ci/archive/20220315/202203152144.uFQqgVUf-lkp@intel.com/config) compiler: nios2-linux-gcc (GCC) 11.2.0 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 # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=4ff8f2ca6ccd9e0cc5665d09f86d631b3ae3a14c git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git git fetch --no-tags mingo-tip sched/core git checkout 4ff8f2ca6ccd9e0cc5665d09f86d631b3ae3a14c # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nios2 SHELL=/bin/bash kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): In file included from kernel/sched/build_utility.c:79: >> kernel/sched/loadavg.c:245:6: warning: no previous prototype for 'calc_load_nohz_start' [-Wmissing-prototypes] 245 | void calc_load_nohz_start(void) | ^~~~~~~~~~~~~~~~~~~~ >> kernel/sched/loadavg.c:258:6: warning: no previous prototype for 'calc_load_nohz_remote' [-Wmissing-prototypes] 258 | void calc_load_nohz_remote(struct rq *rq) | ^~~~~~~~~~~~~~~~~~~~~ >> kernel/sched/loadavg.c:263:6: warning: no previous prototype for 'calc_load_nohz_stop' [-Wmissing-prototypes] 263 | void calc_load_nohz_stop(void) | ^~~~~~~~~~~~~~~~~~~ vim +/calc_load_nohz_start +245 kernel/sched/loadavg.c 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 244 ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 @245) void calc_load_nohz_start(void) ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 246) { ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 247) /* ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 248) * We're going into NO_HZ mode, if there's any pending delta, fold it ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 249) * into the pending NO_HZ delta. ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 250) */ ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 251) calc_load_nohz_fold(this_rq()); ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 252) } ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 253) ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 254) /* ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 255) * Keep track of the load for NOHZ_FULL, must be called between ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 256) * calc_load_nohz_{start,stop}(). ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 257) */ ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 @258) void calc_load_nohz_remote(struct rq *rq) ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 259) { ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 260) calc_load_nohz_fold(rq); ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 261) } ebc0f83c78a2d26 kernel/sched/loadavg.c Peter Zijlstra (Intel 2020-01-11 262) 3c85d6db5e5f05a kernel/sched/loadavg.c Frederic Weisbecker 2017-06-19 @263 void calc_load_nohz_stop(void) 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 264 { 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 265 struct rq *this_rq = this_rq(); 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 266 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 267 /* 6e5f32f7a43f45e kernel/sched/loadavg.c Matt Fleming 2017-02-17 268 * If we're still before the pending sample window, we're done. 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 269 */ caeb5882979bc6f kernel/sched/loadavg.c Matt Fleming 2017-02-17 270 this_rq->calc_load_update = READ_ONCE(calc_load_update); 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 271 if (time_before(jiffies, this_rq->calc_load_update)) 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 272 return; 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 273 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 274 /* 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 275 * We woke inside or after the sample window, this means we're already 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 276 * accounted through the nohz accounting, so skip the entire deal and 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 277 * sync up for the next window. 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 278 */ 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 279 if (time_before(jiffies, this_rq->calc_load_update + 10)) 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 280 this_rq->calc_load_update += LOAD_FREQ; 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 281 } 45ceebf77653975 kernel/sched/proc.c Paul Gortmaker 2013-04-19 282 :::::: The code at line 245 was first introduced by commit :::::: ebc0f83c78a2d26384401ecf2d2fa48063c0ee27 timers/nohz: Update NOHZ load in remote tick :::::: TO: Peter Zijlstra (Intel) :::::: CC: Ingo Molnar --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org