[zen-kernel-zen-kernel:5.10/muqss 14/21] kernel/sched/MuQSS.c:1685:13: warning: variable 'rq' set but not used

[zen-kernel-zen-kernel:5.10/muqss 14/21] kernel/sched/MuQSS.c:1685:13: warning: variable 'rq' set but not used

[kernel test robot]

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Hi Steven,

First bad commit (maybe != root cause):

tree:   https://github.com/zen-kernel/zen-kernel 5.10/muqss
head:   5e029bcb673aa73c2a432f5f78f60351821f5b33
commit: e219172bbe43aed68943e72b19897191b6bd8f8f [14/21] muqss: Fix build error on config leak
config: alpha-randconfig-r006-20201228 (attached as .config)
compiler: alpha-linux-gcc (GCC) 9.3.0
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://github.com/zen-kernel/zen-kernel/commit/e219172bbe43aed68943e72b19897191b6bd8f8f
        git remote add zen-kernel-zen-kernel https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen-kernel-zen-kernel 5.10/muqss
        git checkout e219172bbe43aed68943e72b19897191b6bd8f8f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=alpha 

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/sched/MuQSS.c:639:6: warning: no previous prototype for 'resched_task' [-Wmissing-prototypes]
     639 | void resched_task(struct task_struct *p)
         |      ^~~~~~~~~~~~
   kernel/sched/MuQSS.c: In function 'ttwu_stat':
>> kernel/sched/MuQSS.c:1685:13: warning: variable 'rq' set but not used [-Wunused-but-set-variable]
    1685 |  struct rq *rq;
         |             ^~
   kernel/sched/MuQSS.c: At top level:
   kernel/sched/MuQSS.c:3076:15: warning: no previous prototype for 'nr_active' [-Wmissing-prototypes]
    3076 | unsigned long nr_active(void)
         |               ^~~~~~~~~
   kernel/sched/MuQSS.c:6234:6: warning: no previous prototype for 'resched_cpu' [-Wmissing-prototypes]
    6234 | void resched_cpu(int cpu)
         |      ^~~~~~~~~~~
   kernel/sched/MuQSS.c:7697:6: warning: no previous prototype for 'init_idle_bootup_task' [-Wmissing-prototypes]
    7697 | void init_idle_bootup_task(struct task_struct *idle)
         |      ^~~~~~~~~~~~~~~~~~~~~
   kernel/sched/MuQSS.c:7721:20: warning: no previous prototype for 'sched_create_group' [-Wmissing-prototypes]
    7721 | struct task_group *sched_create_group(struct task_group *parent)
         |                    ^~~~~~~~~~~~~~~~~~
   kernel/sched/MuQSS.c:7732:6: warning: no previous prototype for 'sched_online_group' [-Wmissing-prototypes]
    7732 | void sched_online_group(struct task_group *tg, struct task_group *parent)
         |      ^~~~~~~~~~~~~~~~~~
   kernel/sched/MuQSS.c:7743:6: warning: no previous prototype for 'sched_destroy_group' [-Wmissing-prototypes]
    7743 | void sched_destroy_group(struct task_group *tg)
         |      ^~~~~~~~~~~~~~~~~~~
   kernel/sched/MuQSS.c:7749:6: warning: no previous prototype for 'sched_offline_group' [-Wmissing-prototypes]
    7749 | void sched_offline_group(struct task_group *tg)
         |      ^~~~~~~~~~~~~~~~~~~
   kernel/sched/MuQSS.c:7840:20: warning: initialized field overwritten [-Woverride-init]
    7840 |  .legacy_cftypes = cpu_legacy_files,
         |                    ^~~~~~~~~~~~~~~~
   kernel/sched/MuQSS.c:7840:20: note: (near initialization for 'cpu_cgrp_subsys.legacy_cftypes')


vim +/rq +1685 kernel/sched/MuQSS.c

9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1681  
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1682  static void
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1683  ttwu_stat(struct task_struct *p, int cpu, int wake_flags)
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1684  {
9d6b3eef3a1ec22 Con Kolivas 2019-10-25 @1685  	struct rq *rq;
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1686  
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1687  	if (!schedstat_enabled())
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1688  		return;
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1689  
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1690  	rq = this_rq();
9d6b3eef3a1ec22 Con Kolivas 2019-10-25  1691  

:::::: The code at line 1685 was first introduced by commit
:::::: 9d6b3eef3a1ec22d4d3c74e0b773ff52d3b3a209 MultiQueue Skiplist Scheduler v0.204

:::::: TO: Con Kolivas <kernel@kolivas.org>
:::::: CC: Steven Barrett <steven@liquorix.net>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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