From a36159eec6ca17402b0e146b86efaf76568dc353 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:41:23 +0000
Subject: [PATCH] 重命名 AX88772C_eeprom/asix.c 为 asix_mac.c
---
kernel/drivers/tty/tty_ldisc.c | 26 ++++++++++++++------------
1 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/kernel/drivers/tty/tty_ldisc.c b/kernel/drivers/tty/tty_ldisc.c
index 245c9a5..c23938b 100644
--- a/kernel/drivers/tty/tty_ldisc.c
+++ b/kernel/drivers/tty/tty_ldisc.c
@@ -19,6 +19,7 @@
#include <linux/seq_file.h>
#include <linux/uaccess.h>
#include <linux/ratelimit.h>
+#include "tty.h"
#undef LDISC_DEBUG_HANGUP
@@ -79,7 +80,6 @@
/**
* tty_unregister_ldisc - unload a line discipline
* @disc: ldisc number
- * @new_ldisc: pointer to the ldisc object
*
* Remove a line discipline from the kernel providing it is not
* currently in use.
@@ -156,12 +156,7 @@
* takes tty_ldiscs_lock to guard against ldisc races
*/
-#if defined(CONFIG_LDISC_AUTOLOAD)
- #define INITIAL_AUTOLOAD_STATE 1
-#else
- #define INITIAL_AUTOLOAD_STATE 0
-#endif
-static int tty_ldisc_autoload = INITIAL_AUTOLOAD_STATE;
+static int tty_ldisc_autoload = IS_BUILTIN(CONFIG_LDISC_AUTOLOAD);
static struct tty_ldisc *tty_ldisc_get(struct tty_struct *tty, int disc)
{
@@ -487,6 +482,7 @@
static void tty_ldisc_close(struct tty_struct *tty, struct tty_ldisc *ld)
{
+ lockdep_assert_held_write(&tty->ldisc_sem);
WARN_ON(!test_bit(TTY_LDISC_OPEN, &tty->flags));
clear_bit(TTY_LDISC_OPEN, &tty->flags);
if (ld->ops->close)
@@ -508,6 +504,7 @@
struct tty_ldisc *disc = tty_ldisc_get(tty, ld);
int r;
+ lockdep_assert_held_write(&tty->ldisc_sem);
if (IS_ERR(disc))
return PTR_ERR(disc);
tty->ldisc = disc;
@@ -545,7 +542,7 @@
/**
* tty_set_ldisc - set line discipline
* @tty: the terminal to set
- * @ldisc: the line discipline
+ * @disc: the line discipline number
*
* Set the discipline of a tty line. Must be called from a process
* context. The ldisc change logic has to protect itself against any
@@ -631,6 +628,7 @@
*/
static void tty_ldisc_kill(struct tty_struct *tty)
{
+ lockdep_assert_held_write(&tty->ldisc_sem);
if (!tty->ldisc)
return;
/*
@@ -678,6 +676,7 @@
struct tty_ldisc *ld;
int retval;
+ lockdep_assert_held_write(&tty->ldisc_sem);
ld = tty_ldisc_get(tty, disc);
if (IS_ERR(ld)) {
BUG_ON(disc == N_TTY);
@@ -776,6 +775,10 @@
return retval;
if (o_tty) {
+ /*
+ * Called without o_tty->ldisc_sem held, as o_tty has been
+ * just allocated and no one has a reference to it.
+ */
retval = tty_ldisc_open(o_tty, o_tty->ldisc);
if (retval) {
tty_ldisc_close(tty, tty->ldisc);
@@ -841,13 +844,12 @@
*/
void tty_ldisc_deinit(struct tty_struct *tty)
{
+ /* no ldisc_sem, tty is being destroyed */
if (tty->ldisc)
tty_ldisc_put(tty->ldisc);
tty->ldisc = NULL;
}
-static int zero;
-static int one = 1;
static struct ctl_table tty_table[] = {
{
.procname = "ldisc_autoload",
@@ -855,8 +857,8 @@
.maxlen = sizeof(tty_ldisc_autoload),
.mode = 0644,
.proc_handler = proc_dointvec,
- .extra1 = &zero,
- .extra2 = &one,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
},
{ }
};
--
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