On Wed, Dec 08, 2021 at 02:25:31PM -0600, Eric W. Biederman wrote: > Today the rules are a bit iffy and arbitrary about which kernel > threads have struct kthread present. Both idle threads and thread > started with create_kthread want struct kthread present so that is > effectively all kernel threads. Make the rule that if PF_KTHREAD > and the task is running then struct kthread is present. > > This will allow the kernel thread code to using tsk->exit_code > with different semantics from ordinary processes. Getting rid of ->exit_code abuse is independent from this. I'm not saying that this change is a bad idea, but it's an independent thing. Simply turn these two failure exits into do_exit(0) in 06/10 and that's it. Then this one would get rid of if (!self) and the second of those two calls, but it won't be nailed to that point of queue.
