==========
kdoc - FAILED

Warnings before patch:
files: ['kernel/kthread.c']
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:585 No description found for return value of 'kthread_create_on_node'
Warning: kernel/kthread.c:655 No description found for return value of 'kthread_create_on_cpu'
Warning: kernel/kthread.c:737 No description found for return value of 'kthread_park'
Warning: kernel/kthread.c:781 No description found for return value of 'kthread_stop'
Warning: kernel/kthread.c:811 No description found for return value of 'kthread_stop_put'
Warning: kernel/kthread.c:959 No description found for return value of 'kthreads_update_housekeeping'
Warning: kernel/kthread.c:1010 No description found for return value of 'kthread_worker_fn'
Warning: kernel/kthread.c:1112 No description found for return value of 'kthread_create_worker_on_node'
Warning: kernel/kthread.c:1225 No description found for return value of 'kthread_queue_work'
Warning: kernel/kthread.c:1752 No description found for return value of 'kthread_blkcg'

Current warnings:
files: ['kernel/kthread.c']
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:585 No description found for return value of 'kthread_create_on_node'
Warning: kernel/kthread.c:655 No description found for return value of 'kthread_create_on_cpu'
Warning: kernel/kthread.c:737 No description found for return value of 'kthread_park'
Warning: kernel/kthread.c:781 No description found for return value of 'kthread_stop'
Warning: kernel/kthread.c:811 No description found for return value of 'kthread_stop_put'
Warning: kernel/kthread.c:873 No description found for return value of 'kthread_affine_preferred'
Warning: kernel/kthread.c:971 No description found for return value of 'kthreads_update_housekeeping'
Warning: kernel/kthread.c:1022 No description found for return value of 'kthread_worker_fn'
Warning: kernel/kthread.c:1124 No description found for return value of 'kthread_create_worker_on_node'
Warning: kernel/kthread.c:1237 No description found for return value of 'kthread_queue_work'
Warning: kernel/kthread.c:1764 No description found for return value of 'kthread_blkcg'

Warnings before: 16 after: 17 (add: 1)

New warnings added:
Warning: kernel/kthread.c:873 No description found for return value of 'kthread_affine_preferred'
Per-file breakdown:
     1 kernel/kthread.c