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| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2011-12-23 09:30:47 +0100 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2012-03-28 16:36:43 +0200 |
| commit | 8a4134322bd429d24f71147eb59a47a981e8f63a (patch) | |
| tree | bce9920c5f163669666693cd9d307bd865ad2bb1 /include | |
| parent | 9adc537452e1e341cabd39a02d4788d3c510b0e2 (diff) | |
| download | linux-hpc-8a4134322bd429d24f71147eb59a47a981e8f63a.tar.gz | |
common: DMA-mapping: add WRITE_COMBINE attribute
DMA_ATTR_WRITE_COMBINE specifies that writes to the mapping may be
buffered to improve performance. It will be used by the replacement for
ARM/ARV32 specific dma_alloc_writecombine() function.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/dma-attrs.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/dma-attrs.h b/include/linux/dma-attrs.h index 71ad34eca6e3d1..ada61e1abf2937 100644 --- a/include/linux/dma-attrs.h +++ b/include/linux/dma-attrs.h @@ -13,6 +13,7 @@ enum dma_attr { DMA_ATTR_WRITE_BARRIER, DMA_ATTR_WEAK_ORDERING, + DMA_ATTR_WRITE_COMBINE, DMA_ATTR_MAX, }; |