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SubjectRe: [PATCH 1/5] sched: Split out kernel/sched/syscalls.c from kernel/sched/core.c
Hi Ingo,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tip/sched/core]
[also build test WARNING on linux/master linus/master peterz-queue/sched/core v6.9-rc2 next-20240405]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Ingo-Molnar/sched-Split-out-kernel-sched-syscalls-c-from-kernel-sched-core-c/20240407-164646
base: tip/sched/core
patch link: https://lore.kernel.org/r/20240407084319.1462211-2-mingo%40kernel.org
patch subject: [PATCH 1/5] sched: Split out kernel/sched/syscalls.c from kernel/sched/core.c
config: i386-randconfig-061-20240408 (https://download.01.org/0day-ci/archive/20240408/202404080226.2qQ925j2-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240408/202404080226.2qQ925j2-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404080226.2qQ925j2-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> kernel/sched/syscalls.c:197:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/syscalls.c:197:22: sparse: struct task_struct [noderef] __rcu *
kernel/sched/syscalls.c:197:22: sparse: struct task_struct *
kernel/sched/syscalls.c: note: in included file:
kernel/sched/sched.h:2172:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2172:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2172:25: sparse: struct task_struct *
kernel/sched/sched.h:2344:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2344:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2344:9: sparse: struct task_struct *
kernel/sched/sched.h:2172:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2172:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2172:25: sparse: struct task_struct *
kernel/sched/sched.h:2344:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2344:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2344:9: sparse: struct task_struct *
kernel/sched/syscalls.c:1228:5: sparse: sparse: context imbalance in 'dl_task_check_affinity' - wrong count at exit
kernel/sched/syscalls.c:1331:9: sparse: sparse: context imbalance in 'sched_setaffinity' - different lock contexts for basic block
kernel/sched/syscalls.c:1393:6: sparse: sparse: context imbalance in 'sched_getaffinity' - wrong count at exit

vim +197 kernel/sched/syscalls.c

186
187 /**
188 * idle_cpu - is a given CPU idle currently?
189 * @cpu: the processor in question.
190 *
191 * Return: 1 if the CPU is currently idle. 0 otherwise.
192 */
193 int idle_cpu(int cpu)
194 {
195 struct rq *rq = cpu_rq(cpu);
196
> 197 if (rq->curr != rq->idle)
198 return 0;
199
200 if (rq->nr_running)
201 return 0;
202

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

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