tree:   https://github.com/zen-kernel/zen-kernel 5.14/prjc
head:   f69b5edf3ec3ce17d9eef4ce92bdd4fc9b37e270
commit: 8e79ff69bdee272975f92e45e8b4ecf0690b636e [199/229] sched/alt: [Sync] 2f064a59a11f sched: Change task_struct::state
config: nds32-allyesconfig (attached as .config)
compiler: nds32le-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://github.com/zen-kernel/zen-kernel/commit/8e79ff69bdee272975f92e45e8b4ecf0690b636e
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 5.14/prjc
        git checkout 8e79ff69bdee272975f92e45e8b4ecf0690b636e
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=nds32 SHELL=/bin/bash kernel/sched/

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/alt_core.c:114: warning: cannot understand function prototype: 'int sched_yield_type __read_mostly = 1; '
   kernel/sched/alt_core.c:3001: warning: Function parameter or member 'prev' not described in 'prepare_task_switch'
   kernel/sched/alt_core.c:3034: warning: Excess function parameter 'rq' description in 'finish_task_switch'
   kernel/sched/alt_core.c:5319: warning: Function parameter or member 'flags' not described in 'sys_sched_setattr'
>> kernel/sched/alt_core.c:5387: warning: expecting prototype for sys_sched_getscheduler(). Prototype was for sys_sched_getparam() instead


vim +5387 kernel/sched/alt_core.c

f746b5817d3274 Alfred Chen 2019-08-19  5377  
f746b5817d3274 Alfred Chen 2019-08-19  5378  /**
f746b5817d3274 Alfred Chen 2019-08-19  5379   * sys_sched_getscheduler - get the RT priority of a thread
f746b5817d3274 Alfred Chen 2019-08-19  5380   * @pid: the pid in question.
f746b5817d3274 Alfred Chen 2019-08-19  5381   * @param: structure containing the RT priority.
f746b5817d3274 Alfred Chen 2019-08-19  5382   *
f746b5817d3274 Alfred Chen 2019-08-19  5383   * Return: On success, 0 and the RT priority is in @param. Otherwise, an error
f746b5817d3274 Alfred Chen 2019-08-19  5384   * code.
f746b5817d3274 Alfred Chen 2019-08-19  5385   */
f746b5817d3274 Alfred Chen 2019-08-19  5386  SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param)
f746b5817d3274 Alfred Chen 2019-08-19 @5387  {
f746b5817d3274 Alfred Chen 2019-08-19  5388  	struct sched_param lp = { .sched_priority = 0 };
f746b5817d3274 Alfred Chen 2019-08-19  5389  	struct task_struct *p;
f746b5817d3274 Alfred Chen 2019-08-19  5390  	int retval = -EINVAL;
f746b5817d3274 Alfred Chen 2019-08-19  5391  
f746b5817d3274 Alfred Chen 2019-08-19  5392  	if (!param || pid < 0)
f746b5817d3274 Alfred Chen 2019-08-19  5393  		goto out_nounlock;
f746b5817d3274 Alfred Chen 2019-08-19  5394  
f746b5817d3274 Alfred Chen 2019-08-19  5395  	rcu_read_lock();
f746b5817d3274 Alfred Chen 2019-08-19  5396  	p = find_process_by_pid(pid);
f746b5817d3274 Alfred Chen 2019-08-19  5397  	retval = -ESRCH;
f746b5817d3274 Alfred Chen 2019-08-19  5398  	if (!p)
f746b5817d3274 Alfred Chen 2019-08-19  5399  		goto out_unlock;
f746b5817d3274 Alfred Chen 2019-08-19  5400  
f746b5817d3274 Alfred Chen 2019-08-19  5401  	retval = security_task_getscheduler(p);
f746b5817d3274 Alfred Chen 2019-08-19  5402  	if (retval)
f746b5817d3274 Alfred Chen 2019-08-19  5403  		goto out_unlock;
f746b5817d3274 Alfred Chen 2019-08-19  5404  
f746b5817d3274 Alfred Chen 2019-08-19  5405  	if (task_has_rt_policy(p))
f746b5817d3274 Alfred Chen 2019-08-19  5406  		lp.sched_priority = p->rt_priority;
f746b5817d3274 Alfred Chen 2019-08-19  5407  	rcu_read_unlock();
f746b5817d3274 Alfred Chen 2019-08-19  5408  
f746b5817d3274 Alfred Chen 2019-08-19  5409  	/*
f746b5817d3274 Alfred Chen 2019-08-19  5410  	 * This one might sleep, we cannot do it with a spinlock held ...
f746b5817d3274 Alfred Chen 2019-08-19  5411  	 */
f746b5817d3274 Alfred Chen 2019-08-19  5412  	retval = copy_to_user(param, &lp, sizeof(*param)) ? -EFAULT : 0;
f746b5817d3274 Alfred Chen 2019-08-19  5413  
f746b5817d3274 Alfred Chen 2019-08-19  5414  out_nounlock:
f746b5817d3274 Alfred Chen 2019-08-19  5415  	return retval;
f746b5817d3274 Alfred Chen 2019-08-19  5416  
f746b5817d3274 Alfred Chen 2019-08-19  5417  out_unlock:
f746b5817d3274 Alfred Chen 2019-08-19  5418  	rcu_read_unlock();
f746b5817d3274 Alfred Chen 2019-08-19  5419  	return retval;
f746b5817d3274 Alfred Chen 2019-08-19  5420  }
f746b5817d3274 Alfred Chen 2019-08-19  5421  

:::::: The code at line 5387 was first introduced by commit
:::::: f746b5817d3274fa4f458f87f6b452e7304b1d64 Project C v5.7.5-r2

:::::: TO: Alfred Chen <cchalpha@gmail.com>
:::::: CC: Alfred Chen <cchalpha@gmail.com>

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