kthread_func(9)

✨ kthread_func(9) ✨

okay so bestie, welcome to another page of the Kernel API Manual 💅 this one's called kthread_func and honestly? it's a short one. a little snack. a tiny little morsel of kernel lore 🍓 let's get into it.

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🌸 NAME 🌸

kthread_func — returns the function you specified when the kthread got created 🫶 like, "hey, what was this thread supposed to be running again?" and it just tells you. iconic behavior, no notes.

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✨ SYNOPSIS ✨

void * kthread_func (struct task_struct *task );

that's the whole thing. one function, one argument, one return value. minimalism ate 💅

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🎀 ARGUMENTS 🎀

• task — the kthread task in question 🦋 literally just hand it the task you're curious about and it does its little lookup thing.

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💖 DESCRIPTION 💖

Returns NULL if the task is not a kthread. that's it. that's the description 😭

so like... if you pass in something that isn't a kthread, you get NULL back. that's the documented behavior, that's the whole vibe check, and ngl it's giving "short but important" 👑

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🌈 SEE ALSO 🌈

Kernel file ./kernel/kthread.c — and bestie, the whole kthread cinematic universe lives here, so let me introduce you to the entire friend group 💜:

• kthread_should_stop(9)
• kthread_should_park(9)
• kthread_freezable_should_stop(9)
• kthread_data(9)
• kthread_probe_data(9)
• kthread_complete_and_exit(9)
• kthread_create_on_node(9)
• kthread_bind(9)
• kthread_create_on_cpu(9)
• kthread_unpark(9)
• kthread_park(9)
• kthread_stop(9)
• kthread_stop_put(9)
• kthread_affine_preferred(9)
• kthreads_update_housekeeping(9)
• kthread_worker_fn(9)
• kthread_create_worker_on_node(9)
• kthread_create_worker_on_cpu(9)
• kthread_queue_work(9)
• kthread_delayed_work_timer_fn(9)
• kthread_queue_delayed_work(9)
• kthread_flush_work(9)
• kthread_mod_delayed_work(9)
• kthread_cancel_work_sync(9)
• kthread_cancel_delayed_work_sync(9)
• kthread_flush_worker(9)
• kthread_destroy_worker(9)
• kthread_use_mm(9)
• kthread_unuse_mm(9)
• kthread_associate_blkcg(9)
• kthread_blkcg(9)

like, thirty-one whole references. the kthread fam is large and they all show up to the group chat 🔥

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and that's the page, bestie!! short, sweet, extremely to the point 🧚 this cutie came out of ./kernel, dated October 2026, and lives at kthread_func(9) forever and ever 💖 mwah, go read the rest of the kthread girlies, they're all linked above 👑