linux-kernel - [PATCH] dma-mapping: Undefine dma_map_single(), etc if CONFIG_HAVE_DMA

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Date:	Tue, 14 Jun 2011 13:33:09 +0900
From:	pullip.cho@...sung.com
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org
Cc:	kgene.kim@...sung.com, arnd@...db.de,
	fujita.tomonori@....ntt.co.jp, rmk@....linux.org.uk,
	joerg.roedel@....com, KyongHo Cho <pullip.cho@...sung.com>
Subject: [PATCH] dma-mapping: Undefine dma_map_single(), etc if CONFIG_HAVE_DMA_ATTRS is defined

From: KyongHo Cho <pullip.cho@...sung.com>

If <asm/dma-mapping.h> includes <asm-generic/dma-mapping-common.h>,
dma_map_single() become defined recursively when CONFIG_HAVE_DMA_ATTRS
is not defined.
Since dma_map_*_attrs() are defined in <linux/dma-mapping.h>, those
in <asm-generic/dma-mapping-common.h> must be not defined
if CONFIG_HAVE_DMA_ATTRS is not defined.

Signed-off-by: KyongHo Cho <pullip.cho@...sung.com>
CC: FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
CC: Joerg Roedel <joerg.roedel@....com>
CC Arnd Bergmann <arnd@...db.de>

Change-Id: Ib99ee2b355dbe679263ce2e4e27d6219148c8338
---
 include/asm-generic/dma-mapping-common.h |   13 ++++++++-----
 1 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/include/asm-generic/dma-mapping-common.h b/include/asm-generic/dma-mapping-common.h
index 0c80bb3..b9a2040 100644
--- a/include/asm-generic/dma-mapping-common.h
+++ b/include/asm-generic/dma-mapping-common.h
@@ -6,6 +6,7 @@
 #include <linux/dma-debug.h>
 #include <linux/dma-attrs.h>
 
+#ifdef CONFIG_HAVE_DMA_ATTRS
 static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
 					      size_t size,
 					      enum dma_data_direction dir,
@@ -67,6 +68,13 @@ static inline void dma_unmap_sg_attrs(struct device *dev, struct scatterlist *sg
 		ops->unmap_sg(dev, sg, nents, dir, attrs);
 }
 
+#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
+#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
+#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
+#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
+
+#endif /* CONFIG_HAVE_DMA_ATTRS */
+
 static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
 				      size_t offset, size_t size,
 				      enum dma_data_direction dir)
@@ -160,9 +168,4 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
 
 }
 
-#define dma_map_single(d, a, s, r) dma_map_single_attrs(d, a, s, r, NULL)
-#define dma_unmap_single(d, a, s, r) dma_unmap_single_attrs(d, a, s, r, NULL)
-#define dma_map_sg(d, s, n, r) dma_map_sg_attrs(d, s, n, r, NULL)
-#define dma_unmap_sg(d, s, n, r) dma_unmap_sg_attrs(d, s, n, r, NULL)
-
 #endif
-- 
1.7.1

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