STRUCT NBCON_CONTEXT(9)

🎀 struct nbcon_context(9) 💅

okay so this is a page from the Kernel API Manual, and we're talking about struct nbcon_context — literally the context struct for console acquire/release. bestie, it's giving "the little permission slip your console carries around" ✨

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🌸 NAME 🌸

struct nbcon_context — Context for console acquire/release 🫶

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⭐ SYNOPSIS ⭐

struct nbcon_context {
    struct console          *console;
    unsigned int            spinwait_max_us;
    enum nbcon_prio         prio;
    unsigned int            allow_unsafe_takeover   : 1;
    unsigned int            backlog                 : 1;
    struct printk_buffers   *pbufs;
    u64 seq;
 };

no cap, that's the whole vibe right there 👑

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🦋 Members 🦋

• console — the console this context is associated with. it's her console, she's the main character 💖
• spinwait_max_us — the limit for the spin-wait acquire. like a time-out on how long you're allowed to sit there spinning 🙈
• prio — the priority of the context. important-girl priority levels, iykyk 👑
• allow_unsafe_takeover — lets you perform takeover even if it's unsafe. ⚠️ literally can be used only with NBCON_PRIO_PANIC prio, and heads up: it might cause a system freeze when the console is used later. bestie. that is a real warning, not a cute one 😭💀
• backlog — the ringbuffer has pending records. there's stuff queued, go look 🍓
• pbufs — pointer to the text buffer for this context. the scratch paper, the lil notepad ✨
• seq — the sequence number to print for this context. numbers for days, fr fr 🔥

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🌈 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_write_context(9)
• struct console(9)
• console_srcu_read_flags(9)
• console_srcu_write_flags(9)
• for_each_console_srcu(9)
• for_each_console(9)

like, the whole friend group, honestly 🫶

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🧚 oh and also — the allow_unsafe_takeover bit is genuinely a can of worms. "might cause a system freeze" is not a drill, that's a whole cursed vibe. treat it with respect 💜

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that's the page, bestie — brought to you by ./include/linux, dated October 2026, from the Kernel API Manual. slay, go read some console code 💅✨