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tty: Eliminate global symbol tty_ldisc_N_TTY 

Reduce global tty symbols; move and rename tty_ldisc_begin() as
n_tty_init() and redefine the N_TTY ldisc ops as file scope.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Hurley 2016-01-09 21:35:19 -08:00 committed by Greg Kroah-Hartman
parent d1d027eff5
commit 27228732aa
4 changed files with 10 additions and 13 deletions
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12
drivers/tty/n_tty.c
View File

@ -2497,7 +2497,7 @@ static void n_tty_fasync(struct tty_struct *tty, int on)
}
}
struct tty_ldisc_ops tty_ldisc_N_TTY = {
static struct tty_ldisc_ops n_tty_ops = {
.magic = TTY_LDISC_MAGIC,
.name = "n_tty",
.open = n_tty_open,
@ -2518,14 +2518,18 @@ struct tty_ldisc_ops tty_ldisc_N_TTY = {
* n_tty_inherit_ops - inherit N_TTY methods
* @ops: struct tty_ldisc_ops where to save N_TTY methods
*
* Enables a 'subclass' line discipline to 'inherit' N_TTY
* methods.
* Enables a 'subclass' line discipline to 'inherit' N_TTY methods.
*/
void n_tty_inherit_ops(struct tty_ldisc_ops *ops)
{
*ops = tty_ldisc_N_TTY;
*ops = n_tty_ops;
ops->owner = NULL;
ops->refcount = ops->flags = 0;
}
EXPORT_SYMBOL_GPL(n_tty_inherit_ops);
void __init n_tty_init(void)
{
tty_register_ldisc(N_TTY, &n_tty_ops);
}

2
drivers/tty/tty_io.c
View File

@ -3576,7 +3576,7 @@ void __init console_init(void)
initcall_t *call;
/* Setup the default TTY line discipline. */
tty_ldisc_begin();
n_tty_init();
/*
* set up the console device so that later boot sequences can

6
drivers/tty/tty_ldisc.c
View File

@ -824,9 +824,3 @@ void tty_ldisc_deinit(struct tty_struct *tty)
tty_ldisc_put(tty->ldisc);
tty->ldisc = NULL;
}
void tty_ldisc_begin(void)
{
/* Setup the default TTY line discipline. */
(void) tty_register_ldisc(N_TTY, &tty_ldisc_N_TTY);
}

3
include/linux/tty.h
View File

@ -576,7 +576,6 @@ extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
extern void tty_ldisc_release(struct tty_struct *tty);
extern void tty_ldisc_init(struct tty_struct *tty);
extern void tty_ldisc_deinit(struct tty_struct *tty);
extern void tty_ldisc_begin(void);
static inline int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
char *f, int count)
@ -593,8 +592,8 @@ static inline int tty_ldisc_receive_buf(struct tty_ldisc *ld, unsigned char *p,
/* n_tty.c */
extern struct tty_ldisc_ops tty_ldisc_N_TTY;
extern void n_tty_inherit_ops(struct tty_ldisc_ops *ops);
extern void __init n_tty_init(void);
/* tty_audit.c */
#ifdef CONFIG_AUDIT