pci_epf_free_space(9)

✨ pci_epf_free_space(9) ✨

okay so this is a page from the Kernel API Manual (section 9, bestie, the kernel-internals section 🫶) and it's about pci_epf_free_space — the little cleanup queen of the PCI endpoint world 💅

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🌸 NAME 🌸

pci_epf_free_space — free the allocated PCI EPF register space

like, you allocated it, now let it go 🦋

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🎀 SYNOPSIS 🎀

void pci_epf_free_space (struct pci_epf *epf , void *addr , enum
pci_barno bar , enum pci_epc_interface_type type );

four args, returns void, no notes, no drama 💀

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💖 ARGUMENTS 💖

• epf — the EPF device from whom to free the memory (yes, from whom — very polite of you to ask properly 🎩)
• addr — the virtual address of the PCI EPF register space
• bar — the BAR number corresponding to the register space
• type — Identifies if the allocated space is for primary EPC or secondary EPC (iykyk 👀)

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✨ DESCRIPTION ✨

Invoke to free the allocated PCI EPF register space.

that's literally it, no cap. you call it, the space goes bye-bye, main character cleanup energy 🧹💅

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🌈 SEE ALSO 🌈

Kernel file ./drivers/pci/endpoint/pci-epf-core.c — and the whole friend group:

• pci_epf_unbind(9)
• pci_epf_bind(9)
• pci_epf_add_vepf(9)
• pci_epf_remove_vepf(9)
• pci_epf_alloc_space(9)
• pci_epf_assign_bar_space(9)
• pci_epf_unregister_driver(9)
• __pci_epf_register_driver(9)
• pci_epf_destroy(9)
• pci_epf_create(9)
• pci_epf_align_inbound_addr(9)

the alloc one is right there next to the free one btw, they're giving matched set 🎀👯

lowkey iconic that pci_epf_alloc_space(9) exists and this page is its other half — you literally cannot have one without the other, periodt.

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and that's the vibe check, bestie 💜 this page lives in ./drivers/pci/endpoint (the source tree folder, slay) and the manual dates it October 2026 — so go forth, free your register space, and remember: no leaks, no tears, only 🌸 impeccable memory management 🌸 🫶