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| author | Christoph Hellwig <hch@lst.de> | 2020-08-17 17:41:50 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2020-09-11 10:10:17 +0300 |
| commit | abdaf11ac18925ce8cc229e62e35b342d548ece2 (patch) | |
| tree | c32d6fd1625f6835947ca94130ca0942ef47ad01 /kernel/dma/direct.c | |
| parent | ef1a85b6ca093abb00fbc38ea55fd9ae08ab05ef (diff) | |
| download | linux-abdaf11ac18925ce8cc229e62e35b342d548ece2.tar.xz | |
dma-mapping: add (back) arch_dma_mark_clean for ia64
Add back a hook to optimize dcache flushing after reading executable
code using DMA. This gets ia64 out of the business of pretending to
be dma incoherent just for this optimization.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma/direct.c')
| -rw-r--r-- | kernel/dma/direct.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c index db6ef07aec3b..949c1cbf08b2 100644 --- a/kernel/dma/direct.c +++ b/kernel/dma/direct.c @@ -345,6 +345,9 @@ void dma_direct_sync_sg_for_cpu(struct device *dev, if (unlikely(is_swiotlb_buffer(paddr))) swiotlb_tbl_sync_single(dev, paddr, sg->length, dir, SYNC_FOR_CPU); + + if (dir == DMA_FROM_DEVICE) + arch_dma_mark_clean(paddr, sg->length); } if (!dev_is_dma_coherent(dev)) |