[PATCH] mm/pdflush.c: use BUG_ON

From: Eric Sesterhenn / snakebyte <snakebyte@gmx.de>

Signed-off-by: Eric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>

Index: linux-kj/mm/pdflush.c
===================================================================
--- linux-kj.orig/mm/pdflush.c	2006-01-18 02:21:11.000000000 +0300
+++ linux-kj/mm/pdflush.c	2006-01-18 16:47:20.000000000 +0300
@@ -202,8 +202,7 @@ int pdflush_operation(void (*fn)(unsigne
 	unsigned long flags;
 	int ret = 0;
 
-	if (fn == NULL)
-		BUG();		/* Hard to diagnose if it's deferred */
+	BUG_ON(fn == NULL);	/* Hard to diagnose if it's deferred */
 
 	spin_lock_irqsave(&pdflush_lock, flags);
 	if (list_empty(&pdflush_list)) {