tty: replace BKL with a new tty_lock

As a preparation for replacing the big kernel lock
in the TTY layer, wrap all the callers in new
macros tty_lock, tty_lock_nested and tty_unlock.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/char/briq_panel.c b/drivers/char/briq_panel.c
index 555cd93c2ee5..d5fa113afe37 100644
--- a/drivers/char/briq_panel.c
+++ b/drivers/char/briq_panel.c
@@ -67,15 +67,15 @@ static void set_led(char state)
 
 static int briq_panel_open(struct inode *ino, struct file *filep)
 {
-        lock_kernel();
+        tty_lock();
         /* enforce single access, vfd_is_open is protected by BKL */
         if (vfd_is_open) {
-                unlock_kernel();
+                tty_unlock();
                 return -EBUSY;
         }
         vfd_is_open = 1;
 
-        unlock_kernel();
+        tty_unlock();
         return 0;
 }