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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2020-12-18 11:42:44 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-12-28 16:09:11 +0100 |
| commit | 4ea3cd65e0d47c4d3fc0c86d2d93d97457dc86fb (patch) | |
| tree | 2b9ccdd6cbd363a5ba4f24cab2b4ff451f3e893a /include/linux/tty.h | |
| parent | 5c8fe583cce542aa0b84adc939ce85293de36e5e (diff) | |
| download | lwn-4ea3cd65e0d47c4d3fc0c86d2d93d97457dc86fb.tar.gz lwn-4ea3cd65e0d47c4d3fc0c86d2d93d97457dc86fb.zip | |
tty: rename tty_kopen() and add new function tty_kopen_shared()
Introduce a new function tty_kopen_shared() that yields a struct
tty_struct. The semantic difference to tty_kopen() is that the tty is
expected to be used already. So rename tty_kopen() to
tty_kopen_exclusive() for clearness, adapt the single user and put the
common code in a new static helper function.
tty_kopen_shared is to be used to implement an LED trigger for tty
devices in one of the next patches.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20201218104246.591315-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/tty.h')
| -rw-r--r-- | include/linux/tty.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index c873f475f0a7..df707a5abfac 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -416,7 +416,8 @@ extern struct tty_struct *get_current_tty(void); /* tty_io.c */ extern int __init tty_init(void); extern const char *tty_name(const struct tty_struct *tty); -extern struct tty_struct *tty_kopen(dev_t device); +extern struct tty_struct *tty_kopen_exclusive(dev_t device); +extern struct tty_struct *tty_kopen_shared(dev_t device); extern void tty_kclose(struct tty_struct *tty); extern int tty_dev_name_to_number(const char *name, dev_t *number); extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout); @@ -441,7 +442,7 @@ static inline int __init tty_init(void) { return 0; } static inline const char *tty_name(const struct tty_struct *tty) { return "(none)"; } -static inline struct tty_struct *tty_kopen(dev_t device) +static inline struct tty_struct *tty_kopen_exclusive(dev_t device) { return ERR_PTR(-ENODEV); } static inline void tty_kclose(struct tty_struct *tty) { } |