[deliverable/linux.git] / drivers / tty / tty_mutex.c

#include <linux/tty.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/semaphore.h>
#include <linux/sched.h>

/*
 * The 'big tty mutex'
 *
 * This mutex is taken and released by tty_lock() and tty_unlock(),
 * replacing the older big kernel lock.
 * It can no longer be taken recursively, and does not get
 * released implicitly while sleeping.
 *
 * Don't use in new code.
 */
static DEFINE_MUTEX(big_tty_mutex);

/*
 * Getting the big tty mutex.
 */
void __lockfunc tty_lock(void)
{
	mutex_lock(&big_tty_mutex);
}
EXPORT_SYMBOL(tty_lock);

void __lockfunc tty_unlock(void)
{
	mutex_unlock(&big_tty_mutex);
}
EXPORT_SYMBOL(tty_unlock);
Commit	Line	Data
b07471fa AB	1	#include <linux/tty.h>
	2	#include <linux/module.h>
	3	#include <linux/kallsyms.h>
	4	#include <linux/semaphore.h>
	5	#include <linux/sched.h>
	6
f309532b LT	7	/*
	8	* The 'big tty mutex'
	9	*
	10	* This mutex is taken and released by tty_lock() and tty_unlock(),
	11	* replacing the older big kernel lock.
	12	* It can no longer be taken recursively, and does not get
	13	* released implicitly while sleeping.
	14	*
	15	* Don't use in new code.
	16	*/
	17	static DEFINE_MUTEX(big_tty_mutex);
fde86d31	18
b07471fa AB	19	/*
	20	* Getting the big tty mutex.
	21	*/
f309532b	22	void __lockfunc tty_lock(void)
b07471fa	23	{
f309532b	24	mutex_lock(&big_tty_mutex);
b07471fa AB	25	}
	26	EXPORT_SYMBOL(tty_lock);
	27
f309532b	28	void __lockfunc tty_unlock(void)
b07471fa	29	{
f309532b	30	mutex_unlock(&big_tty_mutex);
b07471fa AB	31	}
b07471fa AB	32	EXPORT_SYMBOL(tty_unlock);