register_node(9)

💖 register_node(9) — from the Kernel API Manual, bestie 💖

okay so you're in the kernel docs, section 9, and the page is register_node. welcome, you're gonna do great 🫶

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✨ NAME ✨

register_node — literally sets up the node device and gets it registered. that's the whole vibe check: initialize + register, one function, no cap 💅

✨ SYNOPSIS ✨

int register_node (int nid );

✨ ARGUMENTS ✨

• nid — the node number you want to use when the device gets created. that's it. that's the whole argument. pick your node number, hand it over, she's off 🌸

✨ RETURN ✨

0 on success — slay, iconic, we love a clean zero ✨

-errno otherwise — i.e. it failed and you get the negative errno back so you know why. not me getting a -errno... 😭 check it!! fr fr 🙈

✨ SEE ALSO ✨

go snoop around the kernel file ./drivers/base/node.c — that's where the magic lives 🦋 and while you're there, these are the friends of the family:

• struct node_access_nodes(9)
• node_set_perf_attrs(9)
• node_update_perf_attrs(9)
• struct node_cache_info(9)
• node_add_cache(9)
• register_memory_node_under_compute_node(9)
• unregister_node(9)

iykyk, the whole node.c friend group is lowkey carrying 💀🔥 go read them, they're giving main character energy 👑

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💡 reminder: register_node gives you 0 or -errno — never assume success, bestie. check the return value every time. periodt 🎀

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source page lives in ./drivers/base and it's dated October 2026 — and yes we're still calling it register_node(9) around here 💜✨