[PATCH v2 5/5] kthread: remove worker->task self assignment

[Bradley Morgan <brads@mainlining.org>]

All kthread worker users now create their workers with
kthread_create_worker*(), which sets worker->task before the worker
starts. The self assignment in kthread_worker_fn() is dead code now.

Remove the assignment but keep the WARN_ON() as a sanity check for
any OOT users still using the old API.

Suggested-by: Frederic Weisbecker <frederic@kernel.org>
Signed-off-by: Bradley Morgan <brads@mainlining.org>
---
 kernel/kthread.c | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 63beb59b7a3d..643407647e79 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -987,12 +987,10 @@ int kthread_worker_fn(void *worker_ptr)
 	struct kthread_worker *worker = worker_ptr;
 	struct kthread_work *work;
 
-	/*
-	 * FIXME: Update the check and remove the assignment when all kthread
-	 * worker users are created using kthread_create_worker*() functions.
+	/* All workers are created with worker->task set. If this fires,
+	 * the caller is broken.
 	 */
-	WARN_ON(worker->task && worker->task != current);
-	worker->task = current;
+	WARN_ON(worker->task != current);
 
 	if (worker->flags & KTW_FREEZABLE)
 		set_freezable();
-- 
2.47.3