Warnings before patch:
files: ['kernel/kthread.c', 'kernel/cgroup/cpuset.c', 'kernel/sched/isolation.c', 'include/linux/kthread.h']
Warning: include/linux/kthread.h:74 No description found for return value of 'kthread_run_on_cpu'
Warning: include/linux/kthread.h:232 No description found for return value of 'kthread_run_worker_on_cpu'
Warning: kernel/cgroup/cpuset.c:1478 No description found for return value of 'rm_siblings_excl_cpus'
Warning: kernel/cgroup/cpuset.c:2553 No description found for return value of 'update_cpumask'
Warning: kernel/cgroup/cpuset.c:2613 No description found for return value of 'update_exclusive_cpumask'
Warning: kernel/cgroup/cpuset.c:3870 No description found for return value of 'cpuset_init'
Warning: kernel/cgroup/cpuset.c:4235 No description found for return value of 'cpuset_cpus_allowed_fallback'
Warning: kernel/cgroup/cpuset.c:4284 No description found for return value of 'cpuset_mems_allowed'
Warning: kernel/cgroup/cpuset.c:4302 No description found for return value of 'cpuset_nodemask_valid_mems_allowed'
Warning: kernel/cgroup/cpuset.c:4454 No description found for return value of 'cpuset_spread_node'
Warning: kernel/cgroup/cpuset.c:4462 No description found for return value of 'cpuset_mem_spread_node'
Warning: kernel/cgroup/cpuset.c:4483 No description found for return value of 'cpuset_mems_allowed_intersects'
Warning: kernel/kthread.c:166 No description found for return value of 'kthread_should_stop'
Warning: kernel/kthread.c:188 No description found for return value of 'kthread_should_park'
Warning: kernel/kthread.c:213 No description found for return value of 'kthread_freezable_should_stop'
Warning: kernel/kthread.c:235 No description found for return value of 'kthread_func'
Warning: kernel/kthread.c:252 No description found for return value of 'kthread_data'
Warning: kernel/kthread.c:267 No description found for return value of 'kthread_probe_data'
Warning: kernel/kthread.c:581 No description found for return value of 'kthread_create_on_node'
Warning: kernel/kthread.c:651 No description found for return value of 'kthread_create_on_cpu'
Warning: kernel/kthread.c:733 No description found for return value of 'kthread_park'
Warning: kernel/kthread.c:777 No description found for return value of 'kthread_stop'
Warning: kernel/kthread.c:807 No description found for return value of 'kthread_stop_put'
Warning: kernel/kthread.c:985 No description found for return value of 'kthread_worker_fn'
Warning: kernel/kthread.c:1087 No description found for return value of 'kthread_create_worker_on_node'
Warning: kernel/kthread.c:1200 No description found for return value of 'kthread_queue_work'
Warning: kernel/kthread.c:1727 No description found for return value of 'kthread_blkcg'

Current warnings:
files: ['kernel/kthread.c', 'kernel/cgroup/cpuset.c', 'kernel/sched/isolation.c', 'include/linux/kthread.h']
Warning: include/linux/kthread.h:74 No description found for return value of 'kthread_run_on_cpu'
Warning: include/linux/kthread.h:233 No description found for return value of 'kthread_run_worker_on_cpu'
Warning: kernel/cgroup/cpuset.c:1477 No description found for return value of 'rm_siblings_excl_cpus'
Warning: kernel/cgroup/cpuset.c:2552 No description found for return value of 'update_cpumask'
Warning: kernel/cgroup/cpuset.c:2612 No description found for return value of 'update_exclusive_cpumask'
Warning: kernel/cgroup/cpuset.c:3869 No description found for return value of 'cpuset_init'
Warning: kernel/cgroup/cpuset.c:4234 No description found for return value of 'cpuset_cpus_allowed_fallback'
Warning: kernel/cgroup/cpuset.c:4283 No description found for return value of 'cpuset_mems_allowed'
Warning: kernel/cgroup/cpuset.c:4301 No description found for return value of 'cpuset_nodemask_valid_mems_allowed'
Warning: kernel/cgroup/cpuset.c:4453 No description found for return value of 'cpuset_spread_node'
Warning: kernel/cgroup/cpuset.c:4461 No description found for return value of 'cpuset_mem_spread_node'
Warning: kernel/cgroup/cpuset.c:4482 No description found for return value of 'cpuset_mems_allowed_intersects'
Warning: kernel/kthread.c:166 No description found for return value of 'kthread_should_stop'
Warning: kernel/kthread.c:188 No description found for return value of 'kthread_should_park'
Warning: kernel/kthread.c:213 No description found for return value of 'kthread_freezable_should_stop'
Warning: kernel/kthread.c:235 No description found for return value of 'kthread_func'
Warning: kernel/kthread.c:252 No description found for return value of 'kthread_data'
Warning: kernel/kthread.c:267 No description found for return value of 'kthread_probe_data'
Warning: kernel/kthread.c:581 No description found for return value of 'kthread_create_on_node'
Warning: kernel/kthread.c:651 No description found for return value of 'kthread_create_on_cpu'
Warning: kernel/kthread.c:733 No description found for return value of 'kthread_park'
Warning: kernel/kthread.c:777 No description found for return value of 'kthread_stop'
Warning: kernel/kthread.c:807 No description found for return value of 'kthread_stop_put'
Warning: kernel/kthread.c:955 No description found for return value of 'kthreads_update_housekeeping'
Warning: kernel/kthread.c:1006 No description found for return value of 'kthread_worker_fn'
Warning: kernel/kthread.c:1108 No description found for return value of 'kthread_create_worker_on_node'
Warning: kernel/kthread.c:1221 No description found for return value of 'kthread_queue_work'
Warning: kernel/kthread.c:1748 No description found for return value of 'kthread_blkcg'

Warnings before: 27 after: 28 (add: 1)

New warnings added:
Warning: kernel/kthread.c:955 No description found for return value of 'kthreads_update_housekeeping'
Per-file breakdown:
     1 kernel/kthread.c