of_get_cpu_node(9)

💅 of_get_cpu_node(9) — Kernel API Manual 💅

okay so bestie, this is the Kernel API Manual page for of_get_cpu_node(9), and it's literally about grabbing the device node for a logical CPU. no cap, let's get into it 🎀

✨ NAME ✨

of_get_cpu_node — get the device node associated with the given logical CPU 👑

🌸 SYNOPSIS 🌸

struct device_node * of_get_cpu_node (int cpu , unsigned int *thread );

🦋 ARGUMENTS 🦋

• cpu — the CPU number (the logical index, bestie) for which the device node is required 🧚
• thread — if it is not NULL, the local thread number within the physical core is returned 💅

🔥 DESCRIPTION 🔥

The main purpose of this function is to retrieve the device node for the given logical CPU index. It should be used to initialize the of_node in cpu device. Once of_node in cpu device is populated, all the further references can use that instead 🫶

CPU logical to physical index mapping is architecture specific and is built before booting secondary cores. This function uses arch_match_cpu_phys_id which can be overridden by architecture specific implementation 🌈

💖 RETURN 💖

A node pointer for the logical cpu with refcount incremented, use of_node_put on it when done. Returns NULL if not found 😭

🌟 SEE ALSO 🌟

Kernel file ./drivers/of/cpu.c of_get_cpu_hwid(9), of_cpu_device_node_get(9), of_cpu_node_to_id(9), of_get_cpu_state_node(9) 🦋

🫶 cute sign-off: source/version is ./drivers/of, dated October 2026 — periodt, bestie 💅✨