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tty: add missing const to termios hw-change helper

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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>
This commit is contained in:
Johan Hovold 2018-05-21 13:08:44 +02:00
parent df1cd63d6d
commit 7b0c6b38c4
2 changed files with 2 additions and 2 deletions
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2
drivers/tty/tty_ioctl.c
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@ -290,7 +290,7 @@ EXPORT_SYMBOL(tty_termios_copy_hw);
* between the two termios structures, or a speed change is needed.
*/
int tty_termios_hw_change(struct ktermios *a, struct ktermios *b)
int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b)
{
if (a->c_ispeed != b->c_ispeed || a->c_ospeed != b->c_ospeed)
return 1;

2
include/linux/tty.h
View File

@ -527,7 +527,7 @@ static inline speed_t tty_get_baud_rate(struct tty_struct *tty)
}
extern void tty_termios_copy_hw(struct ktermios *new, struct ktermios *old);
extern int tty_termios_hw_change(struct ktermios *a, struct ktermios *b);
extern int tty_termios_hw_change(const struct ktermios *a, const struct ktermios *b);
extern int tty_set_termios(struct tty_struct *tty, struct ktermios *kt);
extern struct tty_ldisc *tty_ldisc_ref(struct tty_struct *);