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| author | Christoph Hellwig <hch@lst.de> | 2017-08-27 10:06:22 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2017-10-19 16:37:13 +0200 |
| commit | 95e499fc7fe9c58efedc079634582164de6bbd90 (patch) | |
| tree | 72ade57d8ba5d4474c4b7eff5ef18a6063283dda /arch | |
| parent | acfef4f126a716018127dcf147be0cc16c304e72 (diff) | |
| download | linux-0-day-95e499fc7fe9c58efedc079634582164de6bbd90.tar.gz linux-0-day-95e499fc7fe9c58efedc079634582164de6bbd90.tar.xz | |
x86: make dma_cache_sync a no-op
x86 does not implement DMA_ATTR_NON_CONSISTENT allocations, so it doesn't
make any sense to do any work in dma_cache_sync given that it must be a
no-op when dma_alloc_attrs returns coherent memory.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/dma-mapping.h | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/x86/include/asm/dma-mapping.h b/arch/x86/include/asm/dma-mapping.h index 1387dafdba2d2..c6d3367be9168 100644 --- a/arch/x86/include/asm/dma-mapping.h +++ b/arch/x86/include/asm/dma-mapping.h @@ -71,7 +71,6 @@ static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction dir) { - flush_write_buffers(); } static inline unsigned long dma_alloc_coherent_mask(struct device *dev, |