ldisc: debug aids

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
index 874c2486c0343ccc617072eb77059d51a8a58a6d..a19e935847b0a14e9740184e32d6e099efc26955 100644 (file)
--- a/drivers/char/tty_ldisc.c
+++ b/drivers/char/tty_ldisc.c
@@ -207,6 +207,7 @@ static void tty_ldisc_put(struct tty_ldisc *ld)
        ldo->refcount--;
        module_put(ldo->owner);
        spin_unlock_irqrestore(&tty_ldisc_lock, flags);
+       WARN_ON(ld->refcount);
        kfree(ld);
 }