cpu_rmap_update(9)

💅 cpu_rmap_update(9) 💅

okay so bestie, welcome to the Kernel API Manual, section 9 — yes we're in the kernel-functions chapter, get comfy 🫶

---

✨ NAME ✨

cpu_rmap_update — update CPU rmap following a change of object affinity

like, your object changed its whole personality (CPU-wise) and now the rmap needs to know about it. it's giving "moving to a new city and updating your address" energy 🦋

---

🌸 SYNOPSIS 🌸

int cpu_rmap_update (struct cpu_rmap *rmap , u16 index , const struct
cpumask *affinity );

that's the whole incantation, fr fr — copy it exactly, no cap 💅

---

🎀 ARGUMENTS 🎀

• rmap — the CPU rmap you're updating. this is the main character of the operation 👑
• index — index of the object whose affinity changed. i.e. which object decided to switch things up 😭
• affinity — the new CPU affinity of that object. the fresh new vibe check it's bringing ✨

---

🔥 SEE ALSO 🔥

kernel file ./lib/cpu_rmap.c — go read the source, it eats 💀

• alloc_cpu_rmap(9)
• cpu_rmap_release(9)
• cpu_rmap_get(9)
• cpu_rmap_put(9)
• cpu_rmap_add(9)
• free_irq_cpu_rmap(9)
• irq_cpu_rmap_notify(9)
• irq_cpu_rmap_release(9)
• irq_cpu_rmap_remove(9)
• irq_cpu_rmap_add(9)

---

bestie reminder: this page is from ./lib, dated October 2026, and its title is literally cpu_rmap_update(9) — that's the whole footer, and honestly? iconic. 🌈💖✨