rpaphp_add_slot(9)

💅 rpaphp_add_slot(9) 💅

okay so bestie, welcome to the Kernel API Manual — this is the page for rpaphp_add_slot, and honestly it's giving "small function, big responsibilities." Let's get into it ✨

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🌸 NAME 🌸

rpaphp_add_slot — declare a hotplug slot to the hotplug subsystem. that's it, that's the vibe 🎀

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🦋 SYNOPSIS 🦋

int rpaphp_add_slot (struct device_node *dn );

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💖 ARGUMENTS 💖

• dn — device node of the slot. literally the thing you're handing over, no cap 🫶

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✨ DESCRIPTION ✨

okay so here's the tea: this subroutine registers a hotpluggable slot with the PCI hotplug infrastructure. main character energy fr 💅

when does it get called? two moods:

1. typically during boot time — if the hotplug slots are present at boot time 🌅
2. later, by the dlpar add code — if the slot is being dynamically added during runtime 🔥

and now the plot twist 😭 — if the device node points at an embedded (built-in) slot, this routine will just return without doing anything, because embedded slots cannot be hotplugged. like, it's not allowed, it's simply not that kind of slot, periodt 💀

🫶 good-to-know: to remove a slot, it suffices to call rpaphp_deregister_slot. one call, that's all, slay 👑

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/pci/hotplug/rpaphp_core.c
• set_attention_status(9)
• get_power_status(9)
• get_attention_status(9)
• is_php_dn(9)

go read those next bestie, iykyk 🌈⭐

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aaaand that's the whole page! 💜 this iconic little entry lives under ./drivers/pci/hotplug, dated October 2026, and it's brought to you as rpaphp_add_slot(9) — mwah, go touch some device nodes 🧚💖