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tty: add missing const to termios hw-change helper
Add missing const qualifiers to the parameters of the termios hw-change helper, which is used by a few USB serial drivers. This specifically allows the pl2303 driver to use const arguments in one of its helper as well. Cc: Jiri Slaby <jslaby@suse.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Johan Hovold <johan@kernel.org>
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@ -290,7 +290,7 @@ EXPORT_SYMBOL(tty_termios_copy_hw);
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* between the two termios structures, or a speed change is needed.
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*/
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int tty_termios_hw_change(struct ktermios *a, struct ktermios *b)
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int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b)
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{
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if (a->c_ispeed != b->c_ispeed || a->c_ospeed != b->c_ospeed)
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return 1;
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@ -527,7 +527,7 @@ static inline speed_t tty_get_baud_rate(struct tty_struct *tty)
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}
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extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
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extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
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extern int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b);
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extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt);
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extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);
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