diff --git a/sys/ofed/include/linux/kernel.h b/sys/ofed/include/linux/kernel.h
index 2f665c6663b..d07b3eb2cf0 100644
--- a/sys/ofed/include/linux/kernel.h
+++ b/sys/ofed/include/linux/kernel.h
@@ -59,7 +59,7 @@
 #define	KERN_INFO	"<6>"
 #define	KERN_DEBUG	"<7>"
 
-#define	BUILD_BUG_ON(x)		CTASSERT(x)
+#define	BUILD_BUG_ON(x)		CTASSERT(!(x))
 
 #define BUG()			panic("BUG")
 #define BUG_ON(condition)	do { if (condition) BUG(); } while(0)
diff --git a/sys/ofed/include/linux/log2.h b/sys/ofed/include/linux/log2.h
index ffc1fdb64cf..77a29248658 100644
--- a/sys/ofed/include/linux/log2.h
+++ b/sys/ofed/include/linux/log2.h
@@ -167,4 +167,6 @@ int __ilog2_u64(u64 n)
 	__ilog2_u64(n)				\
  )
 
+#define	order_base_2(x) ilog2(roundup_pow_of_two(x))
+
 #endif	/* _LINUX_LOG2_H_ */