unregister_sys_off_handler(9)

hiii bestie, welcome to unregister_sys_off_handler(9) from the Kernel API Manual 💖 this one’s short and sweet, so let’s get into it.

💅 NAME 💅

unregister_sys_off_handler — unregister sys-off handler ✨

🌸 SYNOPSIS 🌸

void unregister_sys_off_handler (struct sys_off_handler *handler );

🫶 ARGUMENTS 🫶

• handler — the sys-off handler 💅 that’s the one being unregistered.

🎀 DESCRIPTION 🎀

okay so bestie, this is lowkey the unregister step for a sys-off handler. You pass in the given handler, and unregister_sys_off_handler unregisters it. That’s the whole assignment: given sys-off handler in, unregistering happens, no extra plot twists. periodt 💖

🦋 SEE ALSO 🦋

the manpage points you at Kernel file ./kernel/reboot.c, plus this whole bestie roster:

• emergency_restart(9)
• register_reboot_notifier(9)
• unregister_reboot_notifier(9)
• register_restart_handler(9)
• unregister_restart_handler(9)
• do_kernel_restart(9)
• kernel_restart(9)
• kernel_halt(9)
• register_sys_off_handler(9)
• devm_register_sys_off_handler(9)
• devm_register_power_off_handler(9)
• devm_register_restart_handler(9)
• register_platform_power_off(9)
• unregister_platform_power_off(9)
• do_kernel_power_off(9)
• kernel_can_power_off(9)
• kernel_power_off(9)
• orderly_poweroff(9)
• orderly_reboot(9)
• hw_failure_emergency_action_func(9)
• hw_failure_emergency_schedule(9)
• __hw_protection_trigger(9)

mwah 💋 little footer check: source/version is ./kernel, dated October 2026, and yes the page is still unregister_sys_off_handler(9) 🫶✨