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Make tty_unregister_ldisc symmetric to tty_register_ldisc by accepting struct tty_ldisc_ops as a parameter instead of ldisc number. This avoids checking of the ldisc number bounds in tty_unregister_ldisc. Signed-off-by: Jiri Slaby <[email protected]> Cc: William Hubbs <[email protected]> Cc: Chris Brannon <[email protected]> Cc: Kirk Reiser <[email protected]> Cc: Samuel Thibault <[email protected]> Cc: Marcel Holtmann <[email protected]> Cc: Johan Hedberg <[email protected]> Cc: Luiz Augusto von Dentz <[email protected]> Cc: Dmitry Torokhov <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Jakub Kicinski <[email protected]> Cc: Wolfgang Grandegger <[email protected]> Cc: Marc Kleine-Budde <[email protected]> Cc: Andreas Koensgen <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Rodolfo Giometti <[email protected]> Cc: Peter Ujfalusi <[email protected]> Cc: Liam Girdwood <[email protected]> Cc: Mark Brown <[email protected]> Cc: Jaroslav Kysela <[email protected]> Cc: Takashi Iwai <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>