stop_one_cpu_nowait(9)

stop_one_cpu_nowait(9) 💅

okay so bestie, welcome to the Kernel API Manual — this page is all about stop_one_cpu_nowait, and it’s giving “stop a cpu but make it asynchronous” energy. no waiting around, periodt. 💖

🌸 NAME 🌸

stop_one_cpu_nowait — stop a cpu but don't wait for completion 💅

✨ SYNOPSIS ✨

void stop_one_cpu_nowait (unsigned int cpu , cpu_stop_fn_t fn , void
       *arg , struct cpu_stop_work *work_buf );

🎀 ARGUMENTS 🎀

• cpu — cpu to stop 💅
• fn — function to execute ✨
• arg — argument to fn 🫶
• work_buf — pointer to cpu_stop_work structure 👑

🦋 DESCRIPTION 🦋

so it’s similar to stop_one_cpu, but here’s the twist: it doesn't wait for completion. not me being impatient, it’s literally the whole point. 😭

the caller is responsible for ensuring work_buf is currently unused and will remain untouched until the stopper starts executing fn. yes, that’s on you, bestie — guard that buffer with your life. 🔥

💜 CONTEXT 💜

context? don't care, lowkey. but the caller must ensure cpu's stopper stays enabled until the work is queued, e.g. by preempt_disable. that part is not optional, fr fr. 🫶

🌈 SEE ALSO 🌈

• Kernel file: ./kernel/stop_machine.c
• stop_one_cpu(9)
• stop_two_cpus(9)
• stop_cpus(9)
• stop_machine_from_inactive_cpu(9)

k bye bestie 💖 this page’s source/version is ./kernel, dated October 2026, and the footer is still repping stop_one_cpu_nowait(9) — mwah 💅✨