linux-kernel - [tip:sched/core 28/28] arch/ia64/kernel/time.c:110:6: warning: no previous prototype for 'arch_vtime_task

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Message-ID: <202301111250.ESGtakg2-lkp@intel.com>
Date:   Wed, 11 Jan 2023 12:52:39 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nicholas Piggin <npiggin@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        x86@...nel.org
Subject: [tip:sched/core 28/28] arch/ia64/kernel/time.c:110:6: warning: no
 previous prototype for 'arch_vtime_task_switch'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
head:   d74f87f37672e71457bfcc14eca5eeb1d61b6438
commit: c89970202a1153b2fc230e89f90c180bd5bcbcef [28/28] cputime: remove cputime_to_nsecs fallback
config: ia64-randconfig-r011-20230111
compiler: ia64-linux-gcc (GCC) 12.1.0
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/tip/tip.git/commit/?id=c89970202a1153b2fc230e89f90c180bd5bcbcef
        git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip sched/core
        git checkout c89970202a1153b2fc230e89f90c180bd5bcbcef
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash arch/ia64/kernel/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/ia64/kernel/time.c:110:6: warning: no previous prototype for 'arch_vtime_task_switch' [-Wmissing-prototypes]
     110 | void arch_vtime_task_switch(struct task_struct *prev)
         |      ^~~~~~~~~~~~~~~~~~~~~~
   arch/ia64/kernel/time.c:259:6: warning: no previous prototype for 'ia64_init_itm' [-Wmissing-prototypes]
     259 | void ia64_init_itm(void)
         |      ^~~~~~~~~~~~~
   arch/ia64/kernel/time.c:396:1: warning: no previous prototype for 'time_init' [-Wmissing-prototypes]
     396 | time_init (void)
         | ^~~~~~~~~


vim +/arch_vtime_task_switch +110 arch/ia64/kernel/time.c

5bf412cd769eb5 Frederic Weisbecker 2012-09-08  104  
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  105  /*
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  106   * Called from the context switch with interrupts disabled, to charge all
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  107   * accumulated times to the current process, and to prepare accounting on
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  108   * the next process.
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  109   */
e3942ba0405236 Frederic Weisbecker 2012-11-14 @110  void arch_vtime_task_switch(struct task_struct *prev)
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  111  {
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  112  	struct thread_info *pi = task_thread_info(prev);
baa36046d09ea6 Frederic Weisbecker 2012-06-18  113  	struct thread_info *ni = task_thread_info(current);
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  114  
8388d21468e7e7 Frederic Weisbecker 2017-01-05  115  	ni->ac_stamp = pi->ac_stamp;
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  116  	ni->ac_stime = ni->ac_utime = 0;
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  117  }
b64f34cdfe5bef Hidetoshi Seto      2008-01-29  118  

:::::: The code at line 110 was first introduced by commit
:::::: e3942ba04052364d3c6454103362cafd87456010 vtime: Consolidate a bit the ctx switch code

:::::: TO: Frederic Weisbecker <fweisbec@...il.com>
:::::: CC: Frederic Weisbecker <fweisbec@...il.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

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