configure_new_function(9)

💅 configure_new_function(9) — from the Kernel API Manual, bestie

okay so this one is a kernel page, not a command-line thing, so buckle up — it's <purple>configure_new_function</purple> from the Kernel API Manual and it's lowkey doing a lot of heavy lifting for PCI hotplug. iykyk 🫶

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✨ NAME ✨

configure_new_function — sets up the PCI header info for one single device. that's it. that's the whole job. iconic of her honestly 🎀

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🦋 SYNOPSIS 🦋

int configure_new_function (struct controller *ctrl , struct pci_func
*func , u8 behind_bridge , struct resource_lists *resources );

like, look at that signature. four whole arguments. she's serving function-pointer energy 💅

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🌸 ARGUMENTS 🌸

• ctrl — pointer to the controller structure. your main character controller, fr.
• func — pointer to the function structure. the function you're configuring, not to be confused with the C function you're inside of 😭
• behind_bridge — a u8 where 1 means this is a recursive call and 0 means it's not. yes bestie, she recurses. we'll get there.
• resources — pointer to the set of resource lists. the whole squad of resources, handed over by pointer.

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🔥 DESCRIPTION 🔥

okay so the actual vibe: configure_new_function calls itself recursively for bridged devices. 💀 yes, she's that girl — recursion queen, main character energy, calling herself like it's a group chat.

and what does she return? 0 if it's a success. that's it. success = 0, as is tradition in kernel land. 🌈

ngl, this is the kind of function where the summary is one sentence and the recursion does all the talking. no cap.

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👑 SEE ALSO 👑

this is the part where she tags everyone in the group chat — and bestie, it is a long list 🫶

Kernel file ./drivers/pci/hotplug/cpqphp_ctrl.c, plus:

• cpqhp_find_slot(9)
• sort_by_size(9)
• sort_by_max_size(9)
• do_pre_bridge_resource_split(9)
• do_bridge_resource_split(9)
• get_io_resource(9)
• get_max_resource(9)
• get_resource(9)
• cpqhp_resource_sort_and_combine(9)
• cpqhp_slot_create(9)
• slot_remove(9)
• bridge_slot_remove(9)
• cpqhp_slot_find(9)
• set_controller_speed(9)
• board_replaced(9)
• board_added(9)
• remove_board(9)
• cpqhp_pushbutton_thread(9)
• switch_leds(9)
• cpqhp_hardware_test(9)
• configure_new_device(9)

every single one, exactly as written — I would never leave a bestie off the invite list 🧚✨

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and that's the whole page, bestie 💖 she lives in ./drivers/pci/hotplug, the manpage is dated October 2026, and the page itself is configure_new_function(9) — slay, periodt, go configure some functions 🎀🦋💅