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>
diff --git a/drivers/char/selection.c b/drivers/char/selection.c
index 6e79340..85211a3 100644
--- a/drivers/char/selection.c
+++ b/drivers/char/selection.c
@@ -313,7 +313,7 @@
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 @@
__set_current_state(TASK_RUNNING);
tty_ldisc_deref(ld);
- unlock_kernel();
+ tty_unlock();
return 0;
}