STRUCT SYS_OFF_DATA(9)

🎀 struct sys_off_data(9)

okay bestie, welcome to the Kernel API Manual ✨ this page is all about struct sys_off_data, which is literally the sys-off callback argument. no cap, that's the whole main-character vibe.

💖 NAME

struct sys_off_data — the sys-off callback argument 🫶

✨ SYNOPSIS

       struct sys_off_data {
           int mode;
           void *cb_data;
           const char *cmd;
           struct device *dev;
        };

🌸 Members

• mode — the Mode ID 💅 right now it's currently used only by the sys-off restart mode, so peek at enum reboot_mode for the available modes.
• cb_data — the user's callback data 🎀
• cmd — command string ⭐ currently used only by the sys-off restart mode, and it's NULL otherwise.
• dev — device of the sys-off handler 🦋 only if it's known (devm_register_*), and NULL otherwise.

🔮 SEE ALSO

Kernel file ./include/linux/reboot.h, plus enum hw_protection_action(9) and hw_protection_trigger(9) 👑

and that's the tea, bestie 💜 this page is sourced from ./include/linux, dated October 2026, and it's the struct sys_off_data(9) page — periodt 🌈