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Message-ID: <202203152144.uFQqgVUf-lkp@intel.com>
Date: Tue, 15 Mar 2022 21:24:58 +0800
From: kernel test robot <lkp@...el.com>
To: Ingo Molnar <mingo@...nel.org>
Cc: kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [mingo-tip:sched/core 16/16] kernel/sched/loadavg.c:245:6: warning:
no previous prototype for 'calc_load_nohz_start'
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 <lkp@...el.com>
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) <peterz@...radead.org>
:::::: CC: Ingo Molnar <mingo@...nel.org>
---
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