devm_regist...tart_handler(9)

💅 devm_register_restart_handler(9) — like, the Kernel API Manual, bestie ✨

Okay so we're in the Kernel API Manual today and honestly? This one's a little icon. It's a resource-managed restart handler registration situation and it literally does your cleanup for you. Main character energy fr fr. 🎀

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✨ NAME ✨

devm_register_restart_handler — Register restart handler 🦋

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🌸 SYNOPSIS 🌸

int devm_register_restart_handler (struct device *dev , int
(*callback)(struct sys_off_data *data) , void *cb_data );

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💖 ARGUMENTS 💖

• dev — the Device that registers the callback. it's giving "who's the parent here" vibes 👑
• callback — the Callback function. the one that actually does the thing, no cap 🔥
• cb_data — the Callback's argument. lil' care package for your callback 🎀

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⭐ DESCRIPTION ⭐

So what it does is: registers a resource-managed sys-off handler with a default priority, and it's using restart mode. 🌀✨

Returns zero on success, or an error code on failure. That's it. That's the whole vibe check. 💅

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🌈 SEE ALSO 🌈

Kernel file ./kernel/reboot.c — and like, the whole friend group:

• 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)
• unregister_sys_off_handler(9)
• devm_register_sys_off_handler(9)
• devm_register_power_off_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)

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and that's the page!! 🫶 source situation is ./kernel, dated October 2026, and the page name is devm_regist...tart_handler(9) — she's got a truncated name and she's still slaying 💀💜 byeee bestie, go reboot something responsibly 🌸✨