of_get_cpu_hwid(9)

💖 of_get_cpu_hwid(9) 💖

okay bestie, welcome to the of_get_cpu_hwid(9) page — this is the Kernel API Manual and honestly? it's giving "tiny function, big main character energy." 🎀

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✨ NAME ✨

of_get_cpu_hwid — literally just: Get the hardware ID from a CPU device node. that's it. that's the whole vibe. 💅

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🦋 SYNOPSIS 🦋

u64 of_get_cpu_hwid (struct device_node *cpun , unsigned int thread );

like… look at her. two args, one u64 return, no notes. iconic. ✨

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🌸 ARGUMENTS 🌸

• cpun — the CPU number (logical index) for which the device node is required. so like, which CPU node you're asking about, bestie. 🧚
• thread — the local thread number to get the hardware ID for. the specific thread inside that CPU, yup yup. 💜

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⭐ RETURN ⭐

it hands you back the hardware ID for the CPU node 🎉 … or ~0ULL if it's not found 😭. that's the "sorry bestie, nothing here" value, no cap.

fr fr, remember ~0ULL is the not-found answer — if you see it, it's not a real hardware ID, it's the function telling you to look somewhere else. 🙈

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🌈 SEE ALSO 🌈

• Kernel file ./drivers/of/cpu.c 👀
• of_get_cpu_node(9)
• of_cpu_device_node_get(9)
• of_cpu_node_to_id(9)
• of_get_cpu_state_node(9)

all the sibling functions, the whole of cpu friend group 🫶 — go say hi. iykyk. 🦋

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so yeah, that's the whole page ✨ — sourced from ./drivers/of, dated October 2026, and it's of_get_cpu_hwid(9) signing off. slay, go read your device tree, ily, bye 💖👑💅