cpu_pm_exit(9)

🌸 NAME 🌸

cpu_pm_exit — CPU low power exit notifier

okay so welcome to cpu_pm_exit(9), fresh from the Kernel API Manual ✨ — yes bestie, that’s the manual name, folded in right here instead of a boring header line, and the whole page is about the CPU low power exit notifier vibe 💅.

✨ SYNOPSIS ✨

int cpu_pm_exit (void );

🎀 ARGUMENTS 🎀

• void — no arguments, literally zero, not a single one 🫶

💅 DESCRIPTION 💅

okay so cpu_pm_exit notifies listeners that a single CPU is exiting a low power state. That low power state may have caused some blocks in the same power domain as the cpu to reset. It’s giving “we’re back, check your blocks” energy 🔥

Notified drivers can include the VFP co-processor, interrupt controller and its PM extensions, local CPU timers context save/restore which shouldn’t be interrupted. Because of that, it must be called with interrupts disabled — no cap, this is a strict rule, not a vibe suggestion 🚨

bestie, seriously: it must be called with interrupts disabled — that’s the rule, no exceptions 💀

Return conditions are same as __raw_notifier_call_chain — that’s the function to look at for the return behavior, iykyk 💅

🦋 SEE ALSO 🦋

• Kernel file ./kernel/cpu_pm.c
• cpu_pm_register_notifier(9)
• cpu_pm_unregister_notifier(9)
• cpu_pm_enter(9)
• cpu_cluster_pm_enter(9)
• cpu_cluster_pm_exit(9)

and that’s the page, bestie 🫶 cute little sign-off: the source/version is ./kernel, the date is October 2026, and we’re closing out cpu_pm_exit(9) with main character energy 👑💖