tty_unregister_ldisc(9)

💖 tty_unregister_ldisc(9) — straight from the Kernel API Manual 💖

okay bestie, this is the manual page for tty_unregister_ldisc(9), and it is lowkey serving kernel-internals realness ✨

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🌸 NAME 🌸

tty_unregister_ldisc — unload a line discipline 💅

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🎀 SYNOPSIS 🎀

void tty_unregister_ldisc (const struct tty_ldisc_ops *ldisc );

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🦋 ARGUMENTS 🦋

• ldisc — ldisc number. that's it, that's the arg 🫶

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✨ DESCRIPTION ✨

so this function removes a line discipline from the kernel — but only providing it is not currently in use. periodt 💅

🚨 bestie caveat: if it is currently in use, that's a no-go. the "providing it is not currently in use" part is doing a lot of work here.

Locking: takes tty_ldiscs_lock to guard against ldisc races 🔒 no cap, that lock is there to keep the ldisc situation from getting messy.

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🌈 SEE ALSO 🌈

Kernel file ./drivers/tty/tty_ldisc.c is the spot, and here's the whole friend group 💖

• tty_register_ldisc(9)
• tty_ldisc_get(9)
• tty_ldisc_put(9)
• tty_ldisc_ref_wait(9)
• tty_ldisc_ref(9)
• tty_ldisc_deref(9)
• tty_ldisc_flush(9)
• tty_set_termios_ldisc(9)
• tty_ldisc_open(9)
• tty_ldisc_close(9)
• tty_ldisc_failto(9)
• tty_ldisc_restore(9)
• tty_set_ldisc(9)
• tty_ldisc_kill(9)
• tty_reset_termios(9)
• tty_ldisc_reinit(9)
• tty_ldisc_hangup(9)
• tty_ldisc_setup(9)
• tty_ldisc_release(9)
• tty_ldisc_init(9)
• tty_ldisc_deinit(9)

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💌 from ./drivers/tty, dated October 2026 — that's the whole page, bestie, mwah 💋🫶