is_php_dn(9)

📦 version 7.3.1, in nixpkgs unstable

okay so bestie, this is is_php_dn(9) from the Kernel API Manual, and it's giving “tiny helper function with one very specific job” energy. Let's get into it 💅✨

💖 NAME 💖

is_php_dn — return 1 if this is a hotpluggable pci slot, else 0 🎀

✨ SYNOPSIS ✨

int is_php_dn (struct device_node *dn , const __be32 **indexes , const __be32 **names , const __be32 **types , const __be32 **power_domains );

🫶 ARGUMENTS 🫶

  • dn — target device_node 👑
  • indexes — passed to get_children_props 🧚
  • names — passed to get_children_props 🦋
  • types — returned from get_children_props 🌸
  • power_domains — the original literally gives this one no description, bestie. It's just there. 🙈

🌸 DESCRIPTION 🌸

So this routine will return true only if the device node is a hotpluggable slot. That's the whole vibe check. ✅

This routine will return false for built-in pci slots — even when the built-in slots are dlparable. Yep, even then. Built-in slots do not get the hotpluggable crown here 👑💀

🦋 SEE ALSO 🦋

Kernel file ./drivers/pci/hotplug/rpaphp_core.c — plus set_attention_status(9), get_power_status(9), get_attention_status(9), and rpaphp_add_slot(9) 🔥

mwah 💋 this page came from ./drivers/pci/hotplug, dated October 2026, and it's is_php_dn(9) saying byeeee ✨🫶

📦 where this page comes from