mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 09:13:55 +08:00
906cbe1364
We used it really only serial and ami_serial. The rest of the callsites were BUG/WARN_ONs to check if BTM is held. Now that we pruned tty_locked from both of the real users, we can get rid of tty_lock along with __big_tty_mutex_owner. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Alan Cox <alan@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
33 lines
659 B
C
33 lines
659 B
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);
|