BUG_ON() Conversion in drivers/char

this changes if() BUG(); constructs to BUG_ON() which is
cleaner, contains unlikely() and can better optimized away.

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

drivers/char/epca.c

@@ -486,8 +486,7 @@ static void pc_close(struct tty_struct * tty, struct file * filp)
 		} /* End channel is open more than once */
 
 		/* Port open only once go ahead with shutdown & reset */
-		if (ch->count < 0)
-			BUG();
+		BUG_ON(ch->count < 0);
 
 		/* ---------------------------------------------------------------
 			Let the rest of the driver know the channel is being closed.

drivers/char/tty_io.c

@@ -543,14 +543,12 @@ void tty_ldisc_put(int disc)
 	struct tty_ldisc *ld;
 	unsigned long flags;
 
-	if (disc < N_TTY || disc >= NR_LDISCS)
-		BUG();
+	BUG_ON(disc < N_TTY || disc >= NR_LDISCS);
 
 	spin_lock_irqsave(&tty_ldisc_lock, flags);
 	ld = &tty_ldiscs[disc];
-	if(ld->refcount == 0)
-		BUG();
-	ld->refcount --;
+	BUG_ON(ld->refcount == 0);
+	ld->refcount--;
 	module_put(ld->owner);
 	spin_unlock_irqrestore(&tty_ldisc_lock, flags);
 }
@@ -645,8 +643,7 @@ void tty_ldisc_deref(struct tty_ldisc *ld)
 {
 	unsigned long flags;
 
-	if(ld == NULL)
-		BUG();
+	BUG_ON(ld == NULL);
 
 	spin_lock_irqsave(&tty_ldisc_lock, flags);
 	if(ld->refcount == 0)