linux-kernel - [PATCH 4 of 9] swiotlb: Drop SG_ENT_VIRT

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Date:	Mon, 22 Dec 2008 10:26:06 -0800
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Xen-devel <xen-devel@...ts.xensource.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	Becky Bruce <beckyb@...nel.crashing.org>,
	FUJITA Tomonori <fujita.tomonori@....ntt.co.jp>
Subject: [PATCH 4 of 9] swiotlb: Drop SG_ENT_VIRT_ADDRESS macro

From: Becky Bruce <beckyb@...nel.crashing.org>

All SG_ENT_VIRT_ADDRESS does is call sg_virt(), get rid of
this needless layer of complexity.

Signed-off-by: Becky Bruce <beckyb@...nel.crashing.org>
---
 lib/swiotlb.c |    9 ++++-----
 1 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -38,8 +38,7 @@
 #define OFFSET(val,align) ((unsigned long)	\
 	                   ( (val) & ( (align) - 1)))
 
-#define SG_ENT_VIRT_ADDRESS(sg)	(sg_virt((sg)))
-#define SG_ENT_PHYS_ADDRESS(sg)	virt_to_bus(SG_ENT_VIRT_ADDRESS(sg))
+#define SG_ENT_PHYS_ADDRESS(sg)	virt_to_bus(sg_virt(sg))
 
 #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT))
 
@@ -768,9 +767,9 @@
 	BUG_ON(dir == DMA_NONE);
 
 	for_each_sg(sgl, sg, nelems, i) {
-		addr = SG_ENT_VIRT_ADDRESS(sg);
+		addr = sg_virt(sg);
 		dev_addr = swiotlb_virt_to_bus(hwdev, addr);
-		if (range_needs_mapping(sg_virt(sg), sg->length) ||
+		if (range_needs_mapping(addr, sg->length) ||
 		    address_needs_mapping(hwdev, dev_addr, sg->length)) {
 			void *map = map_single(hwdev, addr, sg->length, dir);
 			if (!map) {
@@ -816,7 +815,7 @@
 			unmap_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
 				     sg->dma_length, dir);
 		else if (dir == DMA_FROM_DEVICE)
-			dma_mark_clean(SG_ENT_VIRT_ADDRESS(sg), sg->dma_length);
+			dma_mark_clean(sg_virt(sg), sg->dma_length);
 	}
 }
 EXPORT_SYMBOL(swiotlb_unmap_sg_attrs);
@@ -849,7 +848,7 @@
 			sync_single(hwdev, swiotlb_bus_to_virt(sg->dma_address),
 				    sg->dma_length, dir, target);
 		else if (dir == DMA_FROM_DEVICE)
-			dma_mark_clean(SG_ENT_VIRT_ADDRESS(sg), sg->dma_length);
+			dma_mark_clean(sg_virt(sg), sg->dma_length);
 	}
 }
 


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