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Groups > linux.kernel > #1720552
| From | Christoph Hellwig <hch@lst.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/2] dma-coherent: remove the DMA_MEMORY_INCLUDES_CHILDREN flag |
| Date | 2017-08-26 09:30 +0200 |
| Message-ID | <uiDHz-6Hs-1@gated-at.bofh.it> (permalink) |
| References | <uiDHz-6Hs-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
This flag was never implemented or used. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com> --- Documentation/DMA-API.txt | 4 ---- drivers/base/dma-coherent.c | 2 -- drivers/char/virtio_console.c | 3 --- include/linux/dma-mapping.h | 3 +-- 4 files changed, 1 insertion(+), 11 deletions(-) diff --git a/Documentation/DMA-API.txt b/Documentation/DMA-API.txt index 45b29326d719..ded50aed1cd8 100644 --- a/Documentation/DMA-API.txt +++ b/Documentation/DMA-API.txt @@ -598,10 +598,6 @@ flags can be ORed together and are: One or both of these flags must be present. -- DMA_MEMORY_INCLUDES_CHILDREN - make the declared memory be allocated by - dma_alloc_coherent of any child devices of this one (for memory residing - on a bridge). - - DMA_MEMORY_EXCLUSIVE - only allocate memory from the declared regions. Do not allow dma_alloc_coherent() to fall back to system memory when it's out of memory in the declared region. diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c index 1c152aed6b82..6f6dc4d41788 100644 --- a/drivers/base/dma-coherent.c +++ b/drivers/base/dma-coherent.c @@ -109,8 +109,6 @@ static int dma_assign_coherent_memory(struct device *dev, return -EBUSY; dev->dma_mem = mem; - /* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */ - return 0; } diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c index ad843eb02ae7..48e86ce9fac8 100644 --- a/drivers/char/virtio_console.c +++ b/drivers/char/virtio_console.c @@ -451,9 +451,6 @@ static struct port_buffer *alloc_buf(struct virtqueue *vq, size_t buf_size, * device is created by remoteproc, the DMA memory is * associated with the grandparent device: * vdev => rproc => platform-dev. - * The code here would have been less quirky if - * DMA_MEMORY_INCLUDES_CHILDREN had been supported - * in dma-coherent.c */ if (!vq->vdev->dev.parent || !vq->vdev->dev.parent->parent) goto free_buf; diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h index 66d8ea68f40b..9b12cb255063 100644 --- a/include/linux/dma-mapping.h +++ b/include/linux/dma-mapping.h @@ -710,8 +710,7 @@ static inline int dma_get_cache_alignment(void) /* flags for the coherent memory api */ #define DMA_MEMORY_MAP 0x01 #define DMA_MEMORY_IO 0x02 -#define DMA_MEMORY_INCLUDES_CHILDREN 0x04 -#define DMA_MEMORY_EXCLUSIVE 0x08 +#define DMA_MEMORY_EXCLUSIVE 0x04 #ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, -- 2.11.0
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[PATCH 1/2] dma-coherent: remove the DMA_MEMORY_INCLUDES_CHILDREN flag Christoph Hellwig <hch@lst.de> - 2017-08-26 09:30 +0200
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