do_kernel_restart(9)

💅 do_kernel_restart(9) ✨

okay bestie, welcome to the Kernel API Manual page for do_kernel_restart — it's giving “restart handler call chain execution” and we're gonna make it make sense 🫶

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🌸 NAME 🌸

do_kernel_restart — Execute kernel restart handler call chain. That's the name, no cap 💖

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✨ SYNOPSIS ✨

void do_kernel_restart (char *cmd );

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🎀 ARGUMENTS 🎀

• cmd — pointer to the buffer containing the command to execute for the restart, or NULL. That's literally the whole assignment 🦋

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💅 DESCRIPTION 💅

So this function calls the functions that were registered with register_restart_handler. Main character energy: it runs the restart handler call chain 🔥

It's expected to be called from machine_restart as the last step of the restart sequence. That's the vibe check, bestie — last step, no skipping ahead ✨

If a restart handler function has been registered, it restarts the system immediately. Otherwise it does nothing. Periodt 💀

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👑 SEE ALSO 👑

Kernel file: ./kernel/reboot.c 🧚

• emergency_restart(9)
• register_reboot_notifier(9)
• unregister_reboot_notifier(9)
• register_restart_handler(9)
• unregister_restart_handler(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)
• 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)

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mwah 💋 this page lives in ./kernel, dated October 2026, and the footer still says do_kernel_restart(9) — bye bestie, go restart responsibly 🌈🫶