From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: [linux-rt-devel:linux-5.10.y-rt 180/279] kernel/time/hrtimer.c:2000:6: warning: no previous prototype for function 'cpu_chill'
Date: Sat, 20 Feb 2021 16:27:35 +0800 [thread overview]
Message-ID: <202102201625.yt6cYNku-lkp@intel.com> (raw)
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tree: https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-5.10.y-rt
head: 822f2ce254f44f8e65ccb2cdbd7cf4cf2208a3ff
commit: d8f742a94a343c1e55119961ef3bc669d3aa3c00 [180/279] ARM: Allow to enable RT
config: arm-randconfig-r031-20210220 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git/commit/?id=d8f742a94a343c1e55119961ef3bc669d3aa3c00
git remote add linux-rt-devel https://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
git fetch --no-tags linux-rt-devel linux-5.10.y-rt
git checkout d8f742a94a343c1e55119961ef3bc669d3aa3c00
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm
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/time/hrtimer.c:120:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_REALTIME] = HRTIMER_BASE_REALTIME,
^~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:121:22: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_MONOTONIC] = HRTIMER_BASE_MONOTONIC,
^~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:122:21: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_BOOTTIME] = HRTIMER_BASE_BOOTTIME,
^~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:123:17: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides]
[CLOCK_TAI] = HRTIMER_BASE_TAI,
^~~~~~~~~~~~~~~~
kernel/time/hrtimer.c:118:27: note: previous initialization is here
[0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/time/hrtimer.c:2000:6: warning: no previous prototype for function 'cpu_chill' [-Wmissing-prototypes]
void cpu_chill(void)
^
kernel/time/hrtimer.c:2000:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void cpu_chill(void)
^
static
kernel/time/hrtimer.c:428:20: warning: unused function 'debug_hrtimer_free' [-Wunused-function]
static inline void debug_hrtimer_free(struct hrtimer *timer)
^
kernel/time/hrtimer.c:621:19: warning: unused function 'hrtimer_hres_active' [-Wunused-function]
static inline int hrtimer_hres_active(void)
^
kernel/time/hrtimer.c:1726:20: warning: unused function '__hrtimer_peek_ahead_timers' [-Wunused-function]
static inline void __hrtimer_peek_ahead_timers(void) { }
^
8 warnings generated.
vim +/cpu_chill +2000 kernel/time/hrtimer.c
edbeda46322fbc Al Viro 2017-06-07 1995
ca2a97742c3689 Thomas Gleixner 2012-03-07 1996 #ifdef CONFIG_PREEMPT_RT
ca2a97742c3689 Thomas Gleixner 2012-03-07 1997 /*
ca2a97742c3689 Thomas Gleixner 2012-03-07 1998 * Sleep for 1 ms in hope whoever holds what we want will let it go.
ca2a97742c3689 Thomas Gleixner 2012-03-07 1999 */
ca2a97742c3689 Thomas Gleixner 2012-03-07 @2000 void cpu_chill(void)
ca2a97742c3689 Thomas Gleixner 2012-03-07 2001 {
ca2a97742c3689 Thomas Gleixner 2012-03-07 2002 unsigned int freeze_flag = current->flags & PF_NOFREEZE;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2003 struct task_struct *self = current;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2004 ktime_t chill_time;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2005
ca2a97742c3689 Thomas Gleixner 2012-03-07 2006 raw_spin_lock_irq(&self->pi_lock);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2007 self->saved_state = self->state;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2008 __set_current_state_no_track(TASK_UNINTERRUPTIBLE);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2009 raw_spin_unlock_irq(&self->pi_lock);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2010
ca2a97742c3689 Thomas Gleixner 2012-03-07 2011 chill_time = ktime_set(0, NSEC_PER_MSEC);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2012
ca2a97742c3689 Thomas Gleixner 2012-03-07 2013 current->flags |= PF_NOFREEZE;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2014 schedule_hrtimeout(&chill_time, HRTIMER_MODE_REL_HARD);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2015 if (!freeze_flag)
ca2a97742c3689 Thomas Gleixner 2012-03-07 2016 current->flags &= ~PF_NOFREEZE;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2017
ca2a97742c3689 Thomas Gleixner 2012-03-07 2018 raw_spin_lock_irq(&self->pi_lock);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2019 __set_current_state_no_track(self->saved_state);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2020 self->saved_state = TASK_RUNNING;
ca2a97742c3689 Thomas Gleixner 2012-03-07 2021 raw_spin_unlock_irq(&self->pi_lock);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2022 }
ca2a97742c3689 Thomas Gleixner 2012-03-07 2023 EXPORT_SYMBOL(cpu_chill);
ca2a97742c3689 Thomas Gleixner 2012-03-07 2024 #endif
ca2a97742c3689 Thomas Gleixner 2012-03-07 2025
:::::: The code at line 2000 was first introduced by commit
:::::: ca2a97742c368981d127fcaf7699756da6233d97 rt: Introduce cpu_chill()
:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
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next reply other threads:[~2021-02-20 8:27 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-20 8:27 kernel test robot [this message]
2021-02-20 9:30 ` [linux-rt-devel:linux-5.10.y-rt 180/279] kernel/time/hrtimer.c:2000:6: warning: no previous prototype for function 'cpu_chill' Philip Li
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