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Subject[patch 2.6.13 2/6] swiotlb: cleanup some code duplication cruft
The implementations of swiotlb_sync_single_for_{cpu,device} are
identical. Likewise for swiotlb_syng_sg_for_{cpu,device}. This patch
move the guts of those functions to two new inline functions, and
calls the appropriate one from the bodies of those functions.

Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

lib/swiotlb.c | 45 ++++++++++++++++++++++-----------------------
1 files changed, 22 insertions(+), 23 deletions(-)

diff --git a/lib/swiotlb.c b/lib/swiotlb.c
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -492,9 +492,9 @@ swiotlb_unmap_single(struct device *hwde
* address back to the card, you must first perform a
* swiotlb_dma_sync_for_device, and then the device again owns the buffer
*/
-void
-swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
- size_t size, int dir)
+static inline void
+swiotlb_sync_single(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir)
{
char *dma_addr = phys_to_virt(dev_addr);

@@ -507,17 +507,17 @@ swiotlb_sync_single_for_cpu(struct devic
}

void
+swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
+ size_t size, int dir)
+{
+ swiotlb_sync_single(hwdev, dev_addr, size, dir);
+}
+
+void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
size_t size, int dir)
{
- char *dma_addr = phys_to_virt(dev_addr);
-
- if (dir == DMA_NONE)
- BUG();
- if (dma_addr >= io_tlb_start && dma_addr < io_tlb_end)
- sync_single(hwdev, dma_addr, size, dir);
- else if (dir == DMA_FROM_DEVICE)
- mark_clean(dma_addr, size);
+ swiotlb_sync_single(hwdev, dev_addr, size, dir);
}

/*
@@ -594,9 +594,9 @@ swiotlb_unmap_sg(struct device *hwdev, s
* The same as swiotlb_sync_single_* but for a scatter-gather list, same rules
* and usage.
*/
-void
-swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
- int nelems, int dir)
+static inline void
+swiotlb_sync_sg(struct device *hwdev, struct scatterlist *sg,
+ int nelems, int dir)
{
int i;

@@ -610,18 +610,17 @@ swiotlb_sync_sg_for_cpu(struct device *h
}

void
+swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
+ int nelems, int dir)
+{
+ swiotlb_sync_sg(hwdev, sg, nelems, dir);
+}
+
+void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
int nelems, int dir)
{
- int i;
-
- if (dir == DMA_NONE)
- BUG();
-
- for (i = 0; i < nelems; i++, sg++)
- if (sg->dma_address != SG_ENT_PHYS_ADDRESS(sg))
- sync_single(hwdev, (void *) sg->dma_address,
- sg->dma_length, dir);
+ swiotlb_sync_sg(hwdev, sg, nelems, dir);
}

int
-
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