linux-kernel - [peterz-queue:sched/core 14/15] kernel/sched/core.c:9815:27: error: incompatible pointer types passing 'cpumask_var_t' (aka 'struct cpumask[1]') to parameter of type 'cpumask_var_t *' (aka 'struct cpumask (*)[1]'); take the address with &

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Message-ID: <202210132251.qc6Bo29e-lkp@intel.com>
Date:   Thu, 13 Oct 2022 22:09:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Waiman Long <longman@...hat.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>
Subject: [peterz-queue:sched/core 14/15] kernel/sched/core.c:9815:27: error:
 incompatible pointer types passing 'cpumask_var_t' (aka 'struct cpumask[1]')
 to parameter of type 'cpumask_var_t *' (aka 'struct cpumask (*)[1]'); take
 the address with &

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core
head:   e7c69e86e29590d8bacd63595f3a687d97288ccc
commit: ecf44ad8a0325439035003643fd11725147fae18 [14/15] sched: Enforce user requested affinity
config: x86_64-randconfig-a005
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/peterz/queue.git/commit/?id=ecf44ad8a0325439035003643fd11725147fae18
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/core
        git checkout ecf44ad8a0325439035003643fd11725147fae18
        # 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=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> kernel/sched/core.c:9815:27: error: incompatible pointer types passing 'cpumask_var_t' (aka 'struct cpumask[1]') to parameter of type 'cpumask_var_t *' (aka 'struct cpumask (*)[1]'); take the address with & [-Werror,-Wincompatible-pointer-types]
                   zalloc_cpumask_var_node(rq->scratch_mask, GFP_KERNEL, cpu_to_node(i));
                                           ^~~~~~~~~~~~~~~~
                                           &
   include/linux/cpumask.h:880:59: note: passing argument to parameter 'mask' here
   static inline bool zalloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags,
                                                             ^
   1 error generated.


vim +9815 kernel/sched/core.c

  9767	
  9768			rq->rt.rt_runtime = def_rt_bandwidth.rt_runtime;
  9769	#ifdef CONFIG_RT_GROUP_SCHED
  9770			init_tg_rt_entry(&root_task_group, &rq->rt, NULL, i, NULL);
  9771	#endif
  9772	#ifdef CONFIG_SMP
  9773			rq->sd = NULL;
  9774			rq->rd = NULL;
  9775			rq->cpu_capacity = rq->cpu_capacity_orig = SCHED_CAPACITY_SCALE;
  9776			rq->balance_callback = &balance_push_callback;
  9777			rq->active_balance = 0;
  9778			rq->next_balance = jiffies;
  9779			rq->push_cpu = 0;
  9780			rq->cpu = i;
  9781			rq->online = 0;
  9782			rq->idle_stamp = 0;
  9783			rq->avg_idle = 2*sysctl_sched_migration_cost;
  9784			rq->wake_stamp = jiffies;
  9785			rq->wake_avg_idle = rq->avg_idle;
  9786			rq->max_idle_balance_cost = sysctl_sched_migration_cost;
  9787	
  9788			INIT_LIST_HEAD(&rq->cfs_tasks);
  9789	
  9790			rq_attach_root(rq, &def_root_domain);
  9791	#ifdef CONFIG_NO_HZ_COMMON
  9792			rq->last_blocked_load_update_tick = jiffies;
  9793			atomic_set(&rq->nohz_flags, 0);
  9794	
  9795			INIT_CSD(&rq->nohz_csd, nohz_csd_func, rq);
  9796	#endif
  9797	#ifdef CONFIG_HOTPLUG_CPU
  9798			rcuwait_init(&rq->hotplug_wait);
  9799	#endif
  9800	#endif /* CONFIG_SMP */
  9801			hrtick_rq_init(rq);
  9802			atomic_set(&rq->nr_iowait, 0);
  9803	
  9804	#ifdef CONFIG_SCHED_CORE
  9805			rq->core = rq;
  9806			rq->core_pick = NULL;
  9807			rq->core_enabled = 0;
  9808			rq->core_tree = RB_ROOT;
  9809			rq->core_forceidle_count = 0;
  9810			rq->core_forceidle_occupation = 0;
  9811			rq->core_forceidle_start = 0;
  9812	
  9813			rq->core_cookie = 0UL;
  9814	#endif
> 9815			zalloc_cpumask_var_node(rq->scratch_mask, GFP_KERNEL, cpu_to_node(i));
  9816		}
  9817	
  9818		set_load_weight(&init_task, false);
  9819	
  9820		/*
  9821		 * The boot idle thread does lazy MMU switching as well:
  9822		 */
  9823		mmgrab(&init_mm);
  9824		enter_lazy_tlb(&init_mm, current);
  9825	
  9826		/*
  9827		 * The idle task doesn't need the kthread struct to function, but it
  9828		 * is dressed up as a per-CPU kthread and thus needs to play the part
  9829		 * if we want to avoid special-casing it in code that deals with per-CPU
  9830		 * kthreads.
  9831		 */
  9832		WARN_ON(!set_kthread_struct(current));
  9833	
  9834		/*
  9835		 * Make us the idle thread. Technically, schedule() should not be
  9836		 * called from this thread, however somewhere below it might be,
  9837		 * but because we are the idle thread, we just pick up running again
  9838		 * when this runqueue becomes "idle".
  9839		 */
  9840		init_idle(current, smp_processor_id());
  9841	
  9842		calc_load_update = jiffies + LOAD_FREQ;
  9843	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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