Re: [PATCH 07/11] powerpc: make dma_cache_sync a no-op

2017-10-04 Thread Christophe LEROY
Le 03/10/2017 à 13:43, Christoph Hellwig a écrit : On Tue, Oct 03, 2017 at 01:24:57PM +0200, Christophe LEROY wrote: powerpc 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

Re: [PATCH 07/11] powerpc: make dma_cache_sync a no-op

2017-10-03 Thread Christophe LEROY
Le 03/10/2017 à 12:43, Christoph Hellwig a écrit : powerpc 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. What about arch/powerpc/mm/dma-noncoheren

Re: [PATCH 07/11] powerpc: make dma_cache_sync a no-op

2017-10-03 Thread Christoph Hellwig
On Tue, Oct 03, 2017 at 01:24:57PM +0200, Christophe LEROY wrote: >> powerpc 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. > What about arch/powe

Re: [PATCH 07/11] powerpc: make dma_cache_sync a no-op

2017-10-03 Thread Robin Murphy
On 03/10/17 12:24, Christophe LEROY wrote: > > > Le 03/10/2017 à 12:43, Christoph Hellwig a écrit : >> powerpc 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 coh

[PATCH 07/11] powerpc: make dma_cache_sync a no-op

2017-10-03 Thread Christoph Hellwig
powerpc 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 --- arch/powerpc/include/asm/dma-mapping.h | 2 -- 1 file cha