--- linux-2.4.20-uml/mm/slab.c	2003-02-27 20:56:12.000000000 +0100
+++ linux-2.4.20-uml-henrik/mm/slab.c	2003-05-26 20:57:44.000000000 +0200
@@ -1338,6 +1338,12 @@
 	unsigned long save_flags;
 	void* objp;
 
+#if DEBUG
+	/* trap atomic bugs early on when debugging */
+	if (in_interrupt() && (flags & SLAB_LEVEL_MASK) != SLAB_ATOMIC)
+		BUG();
+#endif
+
 	kmem_cache_alloc_head(cachep, flags);
 try_again:
 	local_irq_save(save_flags);