pci_hp_deregister(9)

💅 pci_hp_deregister — the bye-bye function 💅

okay so real talk, this is a page from the Kernel API Manual (yes bestie, the kernel has lore too) and it's all about pci_hp_deregister, which is the function you call when you want a hotplug_slot to ✨leave✨ the PCI hotplug subsystem. breaking up, but make it kernel.

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🌸 SYNOPSIS 🌸

Like, the whole entire signature. Look at her go:

void pci_hp_deregister (struct hotplug_slot *slot );

no return value, no drama, just vibes. void queen 👑

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🎀 ARGUMENTS 🎀

• slot — pointer to the struct hotplug_slot you wanna deregister. that's it. that's the whole argument. it's giving "one job and she's doing it" 💖

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🦋 DESCRIPTION 🦋

okay so here's the tea ☕: the slot must have been registered with the pci hotplug subsystem previously, and it had to get there through a call to pci_hp_register.

so like... bestie, do not just hand this function a random slot you found lying around. it needs to have already been through pci_hp_register first, otherwise you're not deregistering anything, you're just being chaotic. no cap 🙈

⚠️ ngl this one's important: the slot must have been registered with the pci hotplug subsystem previously with a call to pci_hp_register. that's a requirement, not a suggestion 💀

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🌈 SEE ALSO 🌈

the friend group 🫶 — go read these too:

• Kernel file ./drivers/pci/hotplug/pci_hotplug_core.c
• __pci_hp_register(9)
• __pci_hp_initialize(9)
• pci_hp_add(9)
• pci_hp_del(9)
• pci_hp_destroy(9)
• pci_hp_ignore_link_change(9)
• pci_hp_unignore_link_change(9)
• pci_hp_spurious_link_change(9)

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and that's the whole page bestie, you ate that 💅✨

mwah, ily, go forth and deregister responsibly 🎀 — this cutie lives in ./drivers/pci/hotplug, dated October 2026, and yes it's still part of the Kernel API Manual fr fr 👑💜