| Message ID | 20230524171904.3967031-3-catalin.marinas@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm, dma, arm64: Reduce ARCH_KMALLOC_MINALIGN to 8 | expand |
On Wed, May 24, 2023 at 06:18:51PM +0100, Catalin Marinas wrote: > On arm64, ARCH_DMA_MINALIGN is larger than most cache line size > configurations deployed. Allow an architecture to override > dma_get_cache_alignment() in order to return a run-time probed value > (e.g. cache_line_size()). > > Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> > Cc: Christoph Hellwig <hch@lst.de> > Cc: Robin Murphy <robin.murphy@arm.com> > Cc: Will Deacon <will@kernel.org> Looks good: Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 3288a1339271..c41019289223 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -543,6 +543,7 @@ static inline int dma_set_min_align_mask(struct device *dev, return 0; } +#ifndef dma_get_cache_alignment static inline int dma_get_cache_alignment(void) { #ifdef ARCH_HAS_DMA_MINALIGN @@ -550,6 +551,7 @@ static inline int dma_get_cache_alignment(void) #endif return 1; } +#endif static inline void *dmam_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp)
On arm64, ARCH_DMA_MINALIGN is larger than most cache line size configurations deployed. Allow an architecture to override dma_get_cache_alignment() in order to return a run-time probed value (e.g. cache_line_size()). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Robin Murphy <robin.murphy@arm.com> Cc: Will Deacon <will@kernel.org> --- include/linux/dma-mapping.h | 2 ++ 1 file changed, 2 insertions(+)