n_tty_flush_buffer(9)

💅 n_tty_flush_buffer(9) — Kernel API Manual moment ✨

okay bestie, buckle up 💖 this one is a tiny little function from the Kernel API Manual section 9, and it is literally just here to clean up the input queue. small but mighty, yk? 🎀

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✨ NAME ✨

n_tty_flush_buffer — clean input queue 🧹🌈

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🦋 SYNOPSIS 🦋

void n_tty_flush_buffer (struct tty_struct *tty );

no return value, no drama, just vibes 💅

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🎀 ARGUMENTS 🎀

• tty — the terminal device 📟 she's the main character here, everything happens to her

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💜 DESCRIPTION 💜

okay so basically: this flushes the input buffer 🚽✨. it gets called when the tty layer wants that buffer flushed — like eg at hangup — or when the N_TTY line discipline internally has to clean out the pending queue, for example when some signals show up 😭.

she holds termios_rwsem so producers and consumers are excluded while the buffer indices are getting reset 🔒 no sneaking in while the reset is happening, periodt.

Locking: ctrl.lock, exclusive termios_rwsem 🔐

not me telling you to respect the locking rules... fr fr though, exclusive means exclusive 😤

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🌸 SEE ALSO 🌸

like, the whole friend group 🫶 all from the kernel file ./drivers/tty/n_tty.c:

• n_tty_kick_worker(9)
• n_tty_write_wakeup(9)
• put_tty_queue(9)
• reset_buffer_flags(9)
• is_utf8_continuation(9)
• is_continuation(9)
• do_output_char(9)
• process_output(9)
• process_output_block(9)
• __process_echoes(9)
• add_echo_byte(9)
• echo_move_back_col(9)
• echo_set_canon_col(9)
• echo_erase_tab(9)
• echo_char_raw(9)
• echo_char(9)
• finish_erasing(9)
• eraser(9)
• isig(9)
• n_tty_receive_break(9)
• n_tty_receive_overrun(9)
• n_tty_receive_parity_error(9)
• n_tty_receive_char_flow_ctrl(9)
• n_tty_receive_char(9)
• n_tty_receive_buf_common(9)
• n_tty_set_termios(9)
• n_tty_close(9)
• n_tty_open(9)
• copy_from_read_buf(9)
• canon_copy_from_read_buf(9)
• job_control(9)
• n_tty_read(9)
• n_tty_write(9)
• n_tty_poll(9)
• n_tty_inherit_ops(9)

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that's the whole page, bestie, go slay 🫶✨ this came from ./drivers/tty, version dated October 2026 — ily, stay hydrated, and don't forget to lock your semaphores 💖🔥👑