From 122e28ebac2cc2378101d1d37a5886c3ac1f8b18 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 7 Jul 2010 23:52:38 +0000
Subject: [PATCH] cxgb3: simplify need_skb_unmap

We can use CONFIG_NEED_DMA_MAP_STATE to see if a platform does real
DMA unmapping.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/cxgb3/sge.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/net/cxgb3/sge.c b/drivers/net/cxgb3/sge.c
index 5962b911b5bd..8ff96c6f6de5 100644
--- a/drivers/net/cxgb3/sge.c
+++ b/drivers/net/cxgb3/sge.c
@@ -203,15 +203,11 @@ static inline void refill_rspq(struct adapter *adapter,
  */
 static inline int need_skb_unmap(void)
 {
-	/*
-	 * This structure is used to tell if the platform needs buffer
-	 * unmapping by checking if DECLARE_PCI_UNMAP_ADDR defines anything.
-	 */
-	struct dummy {
-		DEFINE_DMA_UNMAP_ADDR(addr);
-	};
-
-	return sizeof(struct dummy) != 0;
+#ifdef CONFIG_NEED_DMA_MAP_STATE
+	return 1;
+#else
+	return 0;
+#endif
 }
 
 /**
-- 
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