mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-29 13:00:35 +00:00
c2bb524b2e
The tty lock/unlock code does not belong in the special lockfunc section which is treated specially by stack backtraces. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
55 lines
1.1 KiB
C
55 lines
1.1 KiB
C
#include <linux/tty.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kallsyms.h>
|
|
#include <linux/semaphore.h>
|
|
#include <linux/sched.h>
|
|
|
|
/* Legacy tty mutex glue */
|
|
|
|
/*
|
|
* Getting the big tty mutex.
|
|
*/
|
|
|
|
void tty_lock(struct tty_struct *tty)
|
|
{
|
|
if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))
|
|
return;
|
|
tty_kref_get(tty);
|
|
mutex_lock(&tty->legacy_mutex);
|
|
}
|
|
EXPORT_SYMBOL(tty_lock);
|
|
|
|
int tty_lock_interruptible(struct tty_struct *tty)
|
|
{
|
|
if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))
|
|
return -EIO;
|
|
tty_kref_get(tty);
|
|
return mutex_lock_interruptible(&tty->legacy_mutex);
|
|
}
|
|
|
|
void tty_unlock(struct tty_struct *tty)
|
|
{
|
|
if (WARN(tty->magic != TTY_MAGIC, "U Bad %p\n", tty))
|
|
return;
|
|
mutex_unlock(&tty->legacy_mutex);
|
|
tty_kref_put(tty);
|
|
}
|
|
EXPORT_SYMBOL(tty_unlock);
|
|
|
|
void tty_lock_slave(struct tty_struct *tty)
|
|
{
|
|
if (tty && tty != tty->link)
|
|
tty_lock(tty);
|
|
}
|
|
|
|
void tty_unlock_slave(struct tty_struct *tty)
|
|
{
|
|
if (tty && tty != tty->link)
|
|
tty_unlock(tty);
|
|
}
|
|
|
|
void tty_set_lock_subclass(struct tty_struct *tty)
|
|
{
|
|
lockdep_set_subclass(&tty->legacy_mutex, TTY_LOCK_SLAVE);
|
|
}
|