STRUCT CPU_OPERATIONS(9)

💅 struct cpu_operations(9) 💅

okay so this is the Kernel API Manual page for struct cpu_operations(9), and we're literally about to make CPU hotplug callbacks make sense. bestie, no cap 🫶

✨ NAME ✨

struct cpu_operations — callback operations for hotplugging CPUs. 💖

🎀 SYNOPSIS 🎀

here's the struct exactly as it shows up — yes, even those semicolons after #ifdef and #endif, they're literally in there 👀

struct cpu_operations {
    int (*cpu_start)(unsigned int cpu, struct task_struct *tidle);
  #ifdef CONFIG_HOTPLUG_CPU;
    void (*cpu_stop)(void);
    bool (*cpu_is_stopped)(unsigned int cpu);
  #endif;
 };

👯 Members 👯

• cpu_start — boots a cpu into the kernel. iconic behavior, honestly 🔥
• cpu_stop — makes a cpu leave the kernel. must not fail — like, it is not allowed to fail, periodt 💅 and it's called from the cpu being stopped.
• cpu_is_stopped — ensures a cpu has left the kernel. called from another cpu. vibe check complete 🦋

🌈 SEE ALSO 🌈

• Kernel file ./arch/riscv/include/asm/cpu_ops.h — go read the kernel file bestie, iykyk 📖

this page is from ./arch/riscv/include/asm and it's dated October 2026. mwah 💋 stay slaying those cpu ops ✨🫶