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, 2 insertions, 2 deletions

diff --git a/drivers/char/selection.c b/drivers/char/selection.c
index 6e79340d732f..85211a3a5811 100644
--- a/drivers/char/selection.c
+++ b/drivers/char/selection.c
@@ -313,7 +313,7 @@ int paste_selection(struct tty_struct *tty)
         struct  tty_ldisc *ld;
         DECLARE_WAITQUEUE(wait, current);
 
-        lock_kernel();
+        tty_lock_nested(); /* always called with BTM from vt_ioctl */
 
         acquire_console_sem();
         poke_blanked_console();
@@ -338,6 +338,6 @@ int paste_selection(struct tty_struct *tty)
         __set_current_state(TASK_RUNNING);
 
         tty_ldisc_deref(ld);
-        unlock_kernel();
+        tty_unlock();
         return 0;
 }