reset_buffer_flags(9)

💖 NAME 💖

reset_buffer_flags — bestie, it resets the buffer state ✨

so this is a Kernel API Manual moment and honestly? it's giving "small function, big responsibilities" 💅

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🎀 SYNOPSIS 🎀

void reset_buffer_flags (struct n_tty_data *ldata );

no cap, that's the whole signature. short and iconic 👑

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🌸 ARGUMENTS 🌸

• ldata — the line disc data we're resetting, aka the thing we're about to hit with the refresh button 🫶

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🦋 DESCRIPTION 🦋

okay so picture this: you're resetting the read buffer counters and clearing the flags. that's it. that's the whole job. and it slays at it 💀✨

it gets called from n_tty_open and n_tty_flush_buffer — so basically whenever someone opens up or flushes the buffer, this little icon shows up to tidy everything 🌈

Locking — read this part, fr fr, it's the vibe check of the whole function 🙈

• caller holds exclusive termios_rwsem, or
• (locking is not required)

so like... either you're holding the exclusive termios_rwsem, or honestly? locking is not required. both are valid, we love a flexible queen 👑

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⭐ SEE ALSO ⭐

Kernel file ./drivers/tty/n_tty.c — and literally the whole n_tty extended universe, iykyk:

• n_tty_kick_worker(9)
• n_tty_write_wakeup(9)
• put_tty_queue(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, the whole friend group showed up 💜🎀

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bestie moment: if you ever forget what this does, just remember — counters reset, flags cleared, termios_rwsem either held exclusive or literally not needed. that's the tea 🍓

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and that's the page!! sourced from ./drivers/tty, dated October 2026, and yes it's still reset_buffer_flags(9) — she's consistent, she's iconic, she's that girl 💅🌟 bye bestie 🫶💖