mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-05-16 02:01:18 -04:00
Code Issues Packages Projects Releases Wiki Activity

tty: constify tty_ldisc_ops

Browse Source 
tty_ldisc_ops is not modified once registered, so make it const.

Signed-off-by: Qingfang Deng <dqfext@gmail.com>
Link: https://patch.msgid.link/20260206062004.1273890-1-dqfext@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Qingfang Deng
2026-02-06 14:20:03 +08:00
committed by Greg Kroah-Hartman
parent f2a880e802
commit c670267ff5
2 changed files with 11 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/tty/tty_ldisc.c
View File

@@ -44,7 +44,7 @@ enum {
static DEFINE_RAW_SPINLOCK(tty_ldiscs_lock);
/* Line disc dispatch table */
static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
static const struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
/**
* tty_register_ldisc - install a line discipline
@@ -55,7 +55,7 @@ static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
*
* Locking: takes %tty_ldiscs_lock to guard against ldisc races
*/
int tty_register_ldisc(struct tty_ldisc_ops *new_ldisc)
int tty_register_ldisc(const struct tty_ldisc_ops *new_ldisc)
{
unsigned long flags;
@@ -80,7 +80,7 @@ EXPORT_SYMBOL(tty_register_ldisc);
* Locking: takes %tty_ldiscs_lock to guard against ldisc races
*/
void tty_unregister_ldisc(struct tty_ldisc_ops *ldisc)
void tty_unregister_ldisc(const struct tty_ldisc_ops *ldisc)
{
unsigned long flags;
@@ -90,10 +90,10 @@ void tty_unregister_ldisc(struct tty_ldisc_ops *ldisc)
}
EXPORT_SYMBOL(tty_unregister_ldisc);
static struct tty_ldisc_ops *get_ldops(int disc)
static const struct tty_ldisc_ops *get_ldops(int disc)
{
unsigned long flags;
struct tty_ldisc_ops *ldops, *ret;
const struct tty_ldisc_ops *ldops, *ret;
raw_spin_lock_irqsave(&tty_ldiscs_lock, flags);
ret = ERR_PTR(-EINVAL);
@@ -107,7 +107,7 @@ static struct tty_ldisc_ops *get_ldops(int disc)
return ret;
}
static void put_ldops(struct tty_ldisc_ops *ldops)
static void put_ldops(const struct tty_ldisc_ops *ldops)
{
unsigned long flags;
@@ -139,7 +139,7 @@ int tty_ldisc_autoload = IS_BUILTIN(CONFIG_LDISC_AUTOLOAD);
static struct tty_ldisc *tty_ldisc_get(struct tty_struct *tty, int disc)
{
struct tty_ldisc *ld;
struct tty_ldisc_ops *ldops;
const struct tty_ldisc_ops *ldops;
if (disc < N_TTY || disc >= NR_LDISCS)
return ERR_PTR(-EINVAL);
@@ -202,7 +202,7 @@ static void tty_ldiscs_seq_stop(struct seq_file *m, void *v)
static int tty_ldiscs_seq_show(struct seq_file *m, void *v)
{
int i = *(loff_t *)v;
struct tty_ldisc_ops *ldops;
const struct tty_ldisc_ops *ldops;
ldops = get_ldops(i);
if (IS_ERR(ldops))

6
include/linux/tty_ldisc.h
View File

@@ -266,7 +266,7 @@ struct tty_ldisc_ops {
};
struct tty_ldisc {
struct tty_ldisc_ops *ops;
const struct tty_ldisc_ops *ops;
struct tty_struct *tty;
};
@@ -281,8 +281,8 @@ struct tty_ldisc *tty_ldisc_ref_wait(struct tty_struct *);
void tty_ldisc_flush(struct tty_struct *tty);
int tty_register_ldisc(struct tty_ldisc_ops *new_ldisc);
void tty_unregister_ldisc(struct tty_ldisc_ops *ldisc);
int tty_register_ldisc(const struct tty_ldisc_ops *new_ldisc);
void tty_unregister_ldisc(const struct tty_ldisc_ops *ldisc);
int tty_set_ldisc(struct tty_struct *tty, int disc);
#endif /* _LINUX_TTY_LDISC_H */