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| author | Christoph Hellwig <hch@lst.de> | 2018-05-19 08:55:39 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-09-08 11:17:30 +0200 |
| commit | 37fca4bd018f9959cf28ea4a6da9f74ccc4d4025 (patch) | |
| tree | 7643afa9a04190127d62db8c53df389751f050d2 /arch/hexagon | |
| parent | d7b686ebf704e3d91925a535a0905ba6be23757c (diff) | |
| download | linux-37fca4bd018f9959cf28ea4a6da9f74ccc4d4025.tar.bz2 | |
hexagon: remove the sync_single_for_cpu DMA operation
hexagon does all the required cache maintainance at dma map time, and none
at unmap time. It thus has to implement sync_single_for_device to match
the map cace for buffer reuse, but there is no point in doing another
invalidation in the sync_single_cpu_case, which in terms of cache
maintainance is equivalent to the unmap case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/hexagon')
| -rw-r--r-- | arch/hexagon/kernel/dma.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/hexagon/kernel/dma.c b/arch/hexagon/kernel/dma.c index 77459df34e2e..d2b717f352f4 100644 --- a/arch/hexagon/kernel/dma.c +++ b/arch/hexagon/kernel/dma.c @@ -181,13 +181,6 @@ static dma_addr_t hexagon_map_page(struct device *dev, struct page *page, return bus; } -static void hexagon_sync_single_for_cpu(struct device *dev, - dma_addr_t dma_handle, size_t size, - enum dma_data_direction dir) -{ - dma_sync(dma_addr_to_virt(dma_handle), size, dir); -} - static void hexagon_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir) @@ -205,7 +198,6 @@ const struct dma_map_ops hexagon_dma_ops = { .free = hexagon_free_coherent, .map_sg = hexagon_map_sg, .map_page = hexagon_map_page, - .sync_single_for_cpu = hexagon_sync_single_for_cpu, .sync_single_for_device = hexagon_sync_single_for_device, .mapping_error = hexagon_mapping_error, }; |