forked from mirrors/linux
49b8220cee
Some hooks in struct tty_ldisc_ops still reference buffers by 'unsigned char'. Unify to 'u8' as the rest of the tty layer does. Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: Luiz Augusto von Dentz <luiz.dentz@gmail.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Eric Dumazet <edumazet@google.com> Cc: Jakub Kicinski <kuba@kernel.org> Cc: Paolo Abeni <pabeni@redhat.com> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20230810091510.13006-32-jirislaby@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
50 lines
1 KiB
C
50 lines
1 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/tty.h>
|
|
#include <linux/module.h>
|
|
|
|
/*
|
|
* n_null.c - Null line discipline used in the failure path
|
|
*
|
|
* Copyright (C) Intel 2017
|
|
*/
|
|
|
|
static ssize_t n_null_read(struct tty_struct *tty, struct file *file, u8 *buf,
|
|
size_t nr, void **cookie, unsigned long offset)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static ssize_t n_null_write(struct tty_struct *tty, struct file *file,
|
|
const u8 *buf, size_t nr)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static struct tty_ldisc_ops null_ldisc = {
|
|
.owner = THIS_MODULE,
|
|
.num = N_NULL,
|
|
.name = "n_null",
|
|
.read = n_null_read,
|
|
.write = n_null_write,
|
|
};
|
|
|
|
static int __init n_null_init(void)
|
|
{
|
|
BUG_ON(tty_register_ldisc(&null_ldisc));
|
|
return 0;
|
|
}
|
|
|
|
static void __exit n_null_exit(void)
|
|
{
|
|
tty_unregister_ldisc(&null_ldisc);
|
|
}
|
|
|
|
module_init(n_null_init);
|
|
module_exit(n_null_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_ALIAS_LDISC(N_NULL);
|
|
MODULE_DESCRIPTION("Null ldisc driver");
|