usb_anchor_suspend_wakeups(9)

💅 usb_anchor_suspend_wakeups(9) — Kernel API Manual, bestie edition

okay so welcome to the Kernel API Manual, the manual name is literally in the title because that's how we do it here 🎀

✨ NAME ✨

usb_anchor_suspend_wakeups —

yep. that's the whole NAME section. the dash is just... dangling there. no blurb, no summary, nothing. the manpage authors really said "figure it out from the DESCRIPTION, queen" 😭 not me hyping up an empty line but here we are, we contain multitudes 💀

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🌸 SYNOPSIS 🌸

void usb_anchor_suspend_wakeups (struct usb_anchor *anchor );

that's it. that's the whole call. returns void, so no exit status, no error codes, no "did it work" — she just does it and leaves, main character energy 🔥

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🦋 ARGUMENTS 🦋

• anchor — the anchor you want to suspend wakeups on 🫶 like, the specific struct usb_anchor * you're putting on pause. that one. yes, that one.

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💖 DESCRIPTION 💖

okay so here's the tea ☕ — call this to stop the last urb being unanchored from waking up any usb_wait_anchor_empty_timeout waiters. literally, the final urb dips out, and normally all the sleepy little waiters wake up like "omg what happened", and this function is you going "shhh, not yet, we're not done" 🤫

and where does that matter? in the hcd urb give-back path, that's where 💅 it's used there to delay waking up until after the completion handler has run. so the order is: give-back path → handler does its lil thing → then the waiters get their wakeup. no premature vibes. no cap. no waking anybody up before the completion handler has finished, because that would be giving chaos and we are not about that life ✨

bestie note: nothing here is dangerous or deprecated, it's just a timing thing — the whole point is when the wakeup happens, not if. do not skip the completion handler step. the whole function is about respecting the order of operations, periodt 👑

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🌈 SEE ALSO 🌈

the whole usb_* family reunion, all in Kernel file ./drivers/usb/core/urb.c — genuinely iconic lineup, no skips:

• usb_init_urb(9)
• usb_alloc_urb(9)
• usb_free_urb(9)
• usb_get_urb(9)
• usb_anchor_urb(9)
• usb_unanchor_urb(9)
• usb_pipe_type_check(9)
• usb_urb_ep_type_check(9)
• usb_submit_urb(9)
• usb_unlink_urb(9)
• usb_kill_urb(9)
• usb_poison_urb(9)
• usb_block_urb(9)
• usb_kill_anchored_urbs(9)
• usb_poison_anchored_urbs(9)
• usb_unpoison_anchored_urbs(9)
• usb_anchor_resume_wakeups(9) — yes she has a sister, they're a package deal 🫶
• usb_wait_anchor_empty_timeout(9)
• usb_get_from_anchor(9)
• usb_scuttle_anchored_urbs(9)
• usb_anchor_empty(9)

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and that's the post 🎀 this came straight out of ./drivers/usb/core, dated October 2026, and it answers to the name usb_anchor_suspend_wakeups(9) — go forth and delay those wakeups responsibly, ily 💜✨