nbcon_reacquire_nobuf(9)

💖 nbcon_reacquire_nobuf(9) 💖

okay so welcome to the Kernel API Manual, bestie — we're talking about nbcon_reacquire_nobuf(9), and it's giving “console ownership got messy, but we're handling it” energy. ✨

🌸 NAME 🌸

nbcon_reacquire_nobuf — reacquire a console after losing ownership while printing. 🎀

✨ SYNOPSIS ✨

void nbcon_reacquire_nobuf (struct nbcon_write_context *wctxt );

🫶 ARGUMENTS 🫶

• wctxt — the write context that was handed to the write callback. That's the whole argument, and yes, you need it. 💅

🔥 DESCRIPTION 🔥

okay so here's the situation: ownership can be lost at any time due to handover or takeover, so a printing context _must_ be prepared to back out immediately and carefully. No cap. 😭

But plot twist — there are scenarios where the printing context must reacquire ownership in order to finalize or revert hardware changes. This function lets a printing context reacquire ownership using the same priority as its previous ownership. Slay. 👑

🚨 Important vibe check: after a successful reacquire, the printing context will have no output buffer, because that has been lost. This function cannot be used to resume printing. It's giving “ownership back, buffer gone,” so do not try to print with it, bestie. 💀

🦋 SEE ALSO 🦋

Kernel file ./kernel/printk/nbcon.c

• nbcon_state_set(9)
• nbcon_state_read(9)
• nbcon_state_try_cmpxchg(9)
• nbcon_seq_read(9)
• nbcon_seq_force(9)
• nbcon_seq_try_update(9)
• nbcon_context_try_acquire_direct(9)
• nbcon_context_try_acquire_requested(9)
• nbcon_context_try_acquire_handover(9)
• nbcon_context_try_acquire_hostile(9)
• nbcon_context_try_acquire(9)
• nbcon_context_release(9)
• nbcon_context_can_proceed(9)
• nbcon_can_proceed(9)
• __nbcon_context_update_unsafe(9)
• nbcon_enter_unsafe(9)
• nbcon_exit_unsafe(9)
• nbcon_emit_next_record(9)
• nbcon_kthread_should_wakeup(9)
• nbcon_kthread_func(9)
• nbcon_irq_work(9)
• nbcon_kthreads_wake(9)
• nbcon_kthread_create(9)
• nbcon_get_cpu_emergency_nesting(9)
• nbcon_get_default_prio(9)
• nbcon_allow_unsafe_takeover(9)
• nbcon_legacy_emit_next_record(9)
• __nbcon_atomic_flush_pending_con(9)
• nbcon_atomic_flush_pending_con(9)
• __nbcon_atomic_flush_pending(9)
• nbcon_atomic_flush_pending(9)
• nbcon_atomic_flush_unsafe(9)
• nbcon_cpu_emergency_enter(9)
• nbcon_cpu_emergency_exit(9)
• nbcon_alloc(9)
• nbcon_free(9)
• nbcon_device_try_acquire(9)
• nbcon_device_release(9)
• nbcon_kdb_try_acquire(9)
• nbcon_kdb_release(9)
• nbcon_write_context_is_braille(9)
• nbcon_braille_try_acquire(9)
• nbcon_braille_release(9)

that's the whole page, bestie 🫶 source/version corner: ./kernel/printk, October 2026, and the page is nbcon_reacquire_nobuf(9). bye 💅