put_tty_queue(9)

💜 put_tty_queue(9) — the Kernel API Manual tea 🎀

okay so real talk, bestie, we're in the put_tty_queue(9) girlies today — this one lives in the Kernel API Manual and it's lowkey iconic? like, tiny function, huge main character energy ✨

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🌸 NAME 🌸

put_tty_queue — bestie, it literally just adds a character to tty 💅 that's it, that's the whole vibe.

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🦋 SYNOPSIS 🦋

void put_tty_queue (u8 c , struct n_tty_data *ldata );

like yes, returns nothing (void, she gives nothing and takes nothing back, queen), and takes exactly two things. no more, no less, periodt.

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🎀 ARGUMENTS 🎀

• c — the character 💖 just. a character. one (1) little guy. u8. bless.
• ldata — the n_tty data 🫶 this is the vibe container, the data struct where all the n_tty stuff hangs out.

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⭐ DESCRIPTION ⭐

so what she does is: add a character to the tty read_buf queue. that's the whole job. she puts it in the buffer, she goes home. ngl that's a slay 💅

Locking: 🔒 okay listen up because this part matters, do not skip it:

• n_tty_receive_buf / producer path — in this path, the caller holds the non-exclusive termios_rwsem. not exclusive. non-exclusive. we're sharing, we're being polite, it's giving healthy boundaries 🧚

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🌈 SEE ALSO 🌈

okay this list is LONG and honestly it's a whole friend group 🫶 if you liked put_tty_queue(9), the kernel file ./drivers/tty/n_tty.c has so many more besties for you to meet:

• n_tty_kick_worker(9)
• n_tty_write_wakeup(9)
• reset_buffer_flags(9)
• n_tty_flush_buffer(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)

like. thirty-five entries. she said "i'm not coming to the function alone" 😭🔥 genuinely obsessed with the commitment.

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💀 friendly reminder that the non-exclusive termios_rwsem thing is a real locking requirement, not a cute suggestion. hold it on the producer path like you mean it, bestie. no cap.

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and that's the page, babes 🍓 sign-off time: this lil masterpiece comes from the source path ./drivers/tty, stamped October 2026, and it's filed under put_tty_queue(9) forever and ever 💖 mwah, see you in the buffer 🦋✨👑