STRUCT NBCON_WRITE_CONTEXT(9)

💖 struct nbcon_write_context(9) 💖

okay so bestie, welcome to the Kernel API Manual — this page is literally all about the context handed to the nbcon write callbacks, and it is lowkey iconic. let's get into it 💅✨

🌟 NAME 🌟

struct nbcon_write_context — Context handed to the nbcon write callbacks 🫶

✨ SYNOPSIS ✨

struct nbcon_write_context {
    struct nbcon_context    ctxt;
    char *outbuf;
    unsigned int            len;
    bool unsafe_takeover;
  #ifdef CONFIG_PRINTK_EXECUTION_CTX;
    int cpu;
    pid_t pid;
    char comm[TASK_COMM_LEN];
  #endif;
 };

🫶 Members 🫶

the way this struct has layers, fr fr 😭 the cpu, pid, and comm members are sitting inside the #ifdef CONFIG_PRINTK_EXECUTION_CTX block up in the synopsis — don't forget the conditional, bestie 💖

• ctxt — The core console context 👑
• outbuf — Pointer to the text buffer for output ✨
• len — Length to write 📏
• unsafe_takeover — If a hostile takeover in an unsafe state has occurred 😭💀
• cpu — CPU on which the message was generated 🖥️
• pid — PID of the task that generated the message 🧚
• comm — Name of the task that generated the message 🏷️

🌈 SEE ALSO 🌈

Kernel file ./include/linux/console.h:

• struct consw(9)
• enum cons_flags(9)
• struct nbcon_state(9)
• enum nbcon_prio(9)
• struct nbcon_context(9)
• struct console(9)
• console_srcu_read_flags(9)
• console_srcu_write_flags(9)
• for_each_console_srcu(9)
• for_each_console(9)

this cutie is from ./include/linux, dated October 2026, and it's literally struct nbcon_write_context(9) — mwah 💋✨