ldisc: debug aids

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

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c
index 874c2486c03..a19e935847b 100644
--- 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);
 }