Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tty: constify tty_ldisc_ops
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>
authored by
Qingfang Deng
and committed by
Greg Kroah-Hartman
c670267f
f2a880e8
+11
-11
+8
-8
drivers/tty/tty_ldisc.c
+8
-8
drivers/tty/tty_ldisc.c
···
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static DEFINE_RAW_SPINLOCK(tty_ldiscs_lock);
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/* Line disc dispatch table */
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-
static struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
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static const struct tty_ldisc_ops *tty_ldiscs[NR_LDISCS];
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/**
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* tty_register_ldisc - install a line discipline
···
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*
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* Locking: takes %tty_ldiscs_lock to guard against ldisc races
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*/
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int tty_register_ldisc(struct tty_ldisc_ops *new_ldisc)
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int tty_register_ldisc(const struct tty_ldisc_ops *new_ldisc)
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{
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unsigned long flags;
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···
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* Locking: takes %tty_ldiscs_lock to guard against ldisc races
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*/
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-
void tty_unregister_ldisc(struct tty_ldisc_ops *ldisc)
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void tty_unregister_ldisc(const struct tty_ldisc_ops *ldisc)
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{
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unsigned long flags;
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···
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}
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EXPORT_SYMBOL(tty_unregister_ldisc);
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static struct tty_ldisc_ops *get_ldops(int disc)
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static const struct tty_ldisc_ops *get_ldops(int disc)
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{
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unsigned long flags;
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struct tty_ldisc_ops *ldops, *ret;
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const struct tty_ldisc_ops *ldops, *ret;
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raw_spin_lock_irqsave(&tty_ldiscs_lock, flags);
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ret = ERR_PTR(-EINVAL);
···
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return ret;
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}
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static void put_ldops(struct tty_ldisc_ops *ldops)
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static void put_ldops(const struct tty_ldisc_ops *ldops)
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{
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unsigned long flags;
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···
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static struct tty_ldisc *tty_ldisc_get(struct tty_struct *tty, int disc)
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{
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struct tty_ldisc *ld;
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struct tty_ldisc_ops *ldops;
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const struct tty_ldisc_ops *ldops;
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if (disc < N_TTY || disc >= NR_LDISCS)
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return ERR_PTR(-EINVAL);
···
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static int tty_ldiscs_seq_show(struct seq_file *m, void *v)
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{
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int i = *(loff_t *)v;
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struct tty_ldisc_ops *ldops;
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const struct tty_ldisc_ops *ldops;
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ldops = get_ldops(i);
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if (IS_ERR(ldops))
+3
-3
include/linux/tty_ldisc.h
+3
-3
include/linux/tty_ldisc.h
···
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};
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struct tty_ldisc {
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struct tty_ldisc_ops *ops;
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const struct tty_ldisc_ops *ops;
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struct tty_struct *tty;
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};
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···
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void tty_ldisc_flush(struct tty_struct *tty);
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-
int tty_register_ldisc(struct tty_ldisc_ops *new_ldisc);
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void tty_unregister_ldisc(struct tty_ldisc_ops *ldisc);
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int tty_register_ldisc(const struct tty_ldisc_ops *new_ldisc);
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void tty_unregister_ldisc(const struct tty_ldisc_ops *ldisc);
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int tty_set_ldisc(struct tty_struct *tty, int disc);
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#endif /* _LINUX_TTY_LDISC_H */