pmap_unschedule(9)

💅 pmap_unschedule — the manual page, but make it cute

okay so bestie, welcome to pmap_unschedule(9) from the Kernel API Manual ✨ this is the literal undo button for pmap_schedule() — like when you post something and immediately hit delete before anyone sees it 🙈 no cap.

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✨ NAME ✨

pmap_unschedule — Undo work done by pmap_schedule()

periodt. that's the whole vibe. it cleans up after the scheduling function, like a bestie who helps you take your makeup off at 2am 🫶

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🌸 SYNOPSIS 🌸

void pmap_unschedule (unsigned long *map , int bits_per_period , int
periods_in_map , int num_bits , int interval , int start );

it returns void, meaning it gives you nothing back — no return value, no drama, it just does the thing and leaves 💀 iconic behavior honestly.

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🎀 ARGUMENTS 🎀

• map — See pmap_schedule. (iykyk — this is the map, and the other page explains it way better than I ever could 💖)
• bits_per_period — See pmap_schedule. again, bestie, go read that one ✨
• periods_in_map — See pmap_schedule. same deal, same energy 🦋
• num_bits — the number of bits that was passed to schedule. literally the exact same number you handed over before, don't switch it up on me 🙈
• interval — the interval that was passed to schedule. yes. the same interval. matching set, we love consistency 💅
• start — the return value from pmap_schedule. this is the important one!! it's literally the little receipt you got back from scheduling, and now you're handing it back in to reverse the purchase 🔥

lowkey the theme here is: pass in the same stuff you passed to pmap_schedule() (plus its return value as start) or this whole thing is giving chaos 😭

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👑 SEE ALSO 👑

Kernel file: ./drivers/usb/dwc2/hcd_queue.c

and now, the full friend group — all of these are also worth a read, no skips, no scroll-past 🧚:

• dwc2_periodic_channel_available(9)
• dwc2_check_periodic_bandwidth(9)
• pmap_schedule(9)
• dwc2_get_ls_map(9)
• dwc2_qh_print(9)
• dwc2_qh_schedule_print(9)
• dwc2_ls_pmap_schedule(9)
• dwc2_ls_pmap_unschedule(9)
• dwc2_hs_pmap_schedule(9)
• dwc2_hs_pmap_unschedule(9)
• dwc2_uframe_schedule_split(9)
• dwc2_uframe_schedule_hs(9)
• dwc2_uframe_schedule_ls(9)
• dwc2_uframe_schedule(9)
• dwc2_uframe_unschedule(9)
• dwc2_pick_first_frame(9)
• dwc2_do_reserve(9)
• dwc2_do_unreserve(9)
• dwc2_unreserve_timer_fn(9)
• dwc2_check_max_xfer_size(9)
• dwc2_schedule_periodic(9)
• dwc2_deschedule_periodic(9)
• dwc2_wait_timer_fn(9)
• dwc2_qh_init(9)
• dwc2_hcd_qh_create(9)
• dwc2_hcd_qh_free(9)
• dwc2_hcd_qh_add(9)
• dwc2_hcd_qh_unlink(9)
• dwc2_next_for_periodic_split(9)
• dwc2_next_periodic_start(9)
• dwc2_hcd_qtd_init(9)
• dwc2_hcd_qtd_add(9)

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okay that's the whole page bestie, you ate that 💜 this little cutie lives in ./drivers/usb/dwc2, it's stamped October 2026, and it answers to the name pmap_unschedule(9) — go forth and unschedule responsibly 🌈⭐