From: kernel test robot <lkp@intel.com>
To: Ingo Molnar <mingo@kernel.org>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org
Subject: [mingo-tip:sched/headers 2150/2579] kernel/trace/trace_hwlat.c:175:6: warning: no previous prototype for 'trace_hwlat_callback'
Date: Thu, 21 Apr 2022 14:40:16 +0800 [thread overview]
Message-ID: <202204202225.RdSY9Rvx-lkp@intel.com> (raw)
tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head: 49e1ec6c70a6eb4b7de9250a455b8b63eb42afbe
commit: b0a0ce86322929677661f28bec305c68815c387d [2150/2579] headers/deps: Remove <linux/hardirq.h> inclusions from headers that don't need it anymore
config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220420/202204202225.RdSY9Rvx-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-20) 11.2.0
reproduce (this is a W=1 build):
# https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=b0a0ce86322929677661f28bec305c68815c387d
git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
git fetch --no-tags mingo-tip sched/headers
git checkout b0a0ce86322929677661f28bec305c68815c387d
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/cpu/mtrr/ kernel/trace/
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_hwlat.c:175:6: warning: no previous prototype for 'trace_hwlat_callback' [-Wmissing-prototypes]
175 | void trace_hwlat_callback(bool enter)
| ^~~~~~~~~~~~~~~~~~~~
vim +/trace_hwlat_callback +175 kernel/trace/trace_hwlat.c
e7c15cd8a113335c Steven Rostedt (Red Hat 2016-06-23 174)
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 @175) void trace_hwlat_callback(bool enter)
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 176) {
f46b16520a087e89 Daniel Bristot de Oliveira 2021-06-22 177 struct hwlat_kthread_data *kdata = get_cpu_data();
f46b16520a087e89 Daniel Bristot de Oliveira 2021-06-22 178
f46b16520a087e89 Daniel Bristot de Oliveira 2021-06-22 179 if (!kdata->kthread)
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 180) return;
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 181)
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 182) /*
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 183) * Currently trace_clock_local() calls sched_clock() and the
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 184) * generic version is not NMI safe.
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 185) */
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 186) if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK)) {
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 187) if (enter)
f46b16520a087e89 Daniel Bristot de Oliveira 2021-06-22 188 kdata->nmi_ts_start = time_get();
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 189) else
f46b16520a087e89 Daniel Bristot de Oliveira 2021-06-22 190 kdata->nmi_total_ts += time_get() - kdata->nmi_ts_start;
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 191) }
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 192)
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 193) if (enter)
f46b16520a087e89 Daniel Bristot de Oliveira 2021-06-22 194 kdata->nmi_count++;
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 195) }
7b2c86250122de31 Steven Rostedt (Red Hat 2016-08-04 196)
:::::: The code at line 175 was first introduced by commit
:::::: 7b2c86250122de316cbab8754050622ead04af39 tracing: Add NMI tracing in hwlat detector
:::::: TO: Steven Rostedt (Red Hat) <rostedt@goodmis.org>
:::::: CC: Steven Rostedt <rostedt@goodmis.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
reply other threads:[~2022-04-21 6:41 UTC|newest]
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