[zen:6.2/prjc 303/395] kernel/sched/alt_core.c:5782: warning: expecting prototype for sys_sched_getscheduler(). Prototype was for sys_sched_getparam() instead

[kernel test robot <lkp@intel.com>]

Hi Alfred,

FYI, the error/warning still remains.

tree:   https://github.com/zen-kernel/zen-kernel 6.2/prjc
head:   6a80d978aa1f981122f7478fedea389aa9475f9d
commit: 5dbca3a371400fe69ad2177b7a6c9d6436dd1fa0 [303/395] sched/alt: [Sync] f5d39b020809 freezer,sched: Rewrite core freezer logic
config: hexagon-randconfig-r041-20230430 (https://download.01.org/0day-ci/archive/20230430/202304300405.eRp0JeAX-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 437b7602e4a998220871de78afcb020b9c14a661)
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/5dbca3a371400fe69ad2177b7a6c9d6436dd1fa0
        git remote add zen https://github.com/zen-kernel/zen-kernel
        git fetch --no-tags zen 6.2/prjc
        git checkout 5dbca3a371400fe69ad2177b7a6c9d6436dd1fa0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/sched/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202304300405.eRp0JeAX-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:3455: warning: Function parameter or member 'prev' not described in 'prepare_task_switch'
   kernel/sched/alt_core.c:3488: warning: Excess function parameter 'rq' description in 'finish_task_switch'
   kernel/sched/alt_core.c:5714: warning: Function parameter or member 'flags' not described in 'sys_sched_setattr'
>> kernel/sched/alt_core.c:5782: warning: expecting prototype for sys_sched_getscheduler(). Prototype was for sys_sched_getparam() instead


vim +5782 kernel/sched/alt_core.c

8b025fc742d760 Alfred Chen 2019-08-19  5772  
8b025fc742d760 Alfred Chen 2019-08-19  5773  /**
8b025fc742d760 Alfred Chen 2019-08-19  5774   * sys_sched_getscheduler - get the RT priority of a thread
8b025fc742d760 Alfred Chen 2019-08-19  5775   * @pid: the pid in question.
8b025fc742d760 Alfred Chen 2019-08-19  5776   * @param: structure containing the RT priority.
8b025fc742d760 Alfred Chen 2019-08-19  5777   *
8b025fc742d760 Alfred Chen 2019-08-19  5778   * Return: On success, 0 and the RT priority is in @param. Otherwise, an error
8b025fc742d760 Alfred Chen 2019-08-19  5779   * code.
8b025fc742d760 Alfred Chen 2019-08-19  5780   */
8b025fc742d760 Alfred Chen 2019-08-19  5781  SYSCALL_DEFINE2(sched_getparam, pid_t, pid, struct sched_param __user *, param)
8b025fc742d760 Alfred Chen 2019-08-19 @5782  {
8b025fc742d760 Alfred Chen 2019-08-19  5783  	struct sched_param lp = { .sched_priority = 0 };
8b025fc742d760 Alfred Chen 2019-08-19  5784  	struct task_struct *p;
8b025fc742d760 Alfred Chen 2019-08-19  5785  	int retval = -EINVAL;
8b025fc742d760 Alfred Chen 2019-08-19  5786  
8b025fc742d760 Alfred Chen 2019-08-19  5787  	if (!param || pid < 0)
8b025fc742d760 Alfred Chen 2019-08-19  5788  		goto out_nounlock;
8b025fc742d760 Alfred Chen 2019-08-19  5789  
8b025fc742d760 Alfred Chen 2019-08-19  5790  	rcu_read_lock();
8b025fc742d760 Alfred Chen 2019-08-19  5791  	p = find_process_by_pid(pid);
8b025fc742d760 Alfred Chen 2019-08-19  5792  	retval = -ESRCH;
8b025fc742d760 Alfred Chen 2019-08-19  5793  	if (!p)
8b025fc742d760 Alfred Chen 2019-08-19  5794  		goto out_unlock;
8b025fc742d760 Alfred Chen 2019-08-19  5795  
8b025fc742d760 Alfred Chen 2019-08-19  5796  	retval = security_task_getscheduler(p);
8b025fc742d760 Alfred Chen 2019-08-19  5797  	if (retval)
8b025fc742d760 Alfred Chen 2019-08-19  5798  		goto out_unlock;
8b025fc742d760 Alfred Chen 2019-08-19  5799  
8b025fc742d760 Alfred Chen 2019-08-19  5800  	if (task_has_rt_policy(p))
8b025fc742d760 Alfred Chen 2019-08-19  5801  		lp.sched_priority = p->rt_priority;
8b025fc742d760 Alfred Chen 2019-08-19  5802  	rcu_read_unlock();
8b025fc742d760 Alfred Chen 2019-08-19  5803  
8b025fc742d760 Alfred Chen 2019-08-19  5804  	/*
8b025fc742d760 Alfred Chen 2019-08-19  5805  	 * This one might sleep, we cannot do it with a spinlock held ...
8b025fc742d760 Alfred Chen 2019-08-19  5806  	 */
8b025fc742d760 Alfred Chen 2019-08-19  5807  	retval = copy_to_user(param, &lp, sizeof(*param)) ? -EFAULT : 0;
8b025fc742d760 Alfred Chen 2019-08-19  5808  
8b025fc742d760 Alfred Chen 2019-08-19  5809  out_nounlock:
8b025fc742d760 Alfred Chen 2019-08-19  5810  	return retval;
8b025fc742d760 Alfred Chen 2019-08-19  5811  
8b025fc742d760 Alfred Chen 2019-08-19  5812  out_unlock:
8b025fc742d760 Alfred Chen 2019-08-19  5813  	rcu_read_unlock();
8b025fc742d760 Alfred Chen 2019-08-19  5814  	return retval;
8b025fc742d760 Alfred Chen 2019-08-19  5815  }
8b025fc742d760 Alfred Chen 2019-08-19  5816  

:::::: The code at line 5782 was first introduced by commit
:::::: 8b025fc742d76091232a7404a7ad09c8cad61492 Project C v5.7.5-r2

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

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