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Commit ada65c74 authored by Maarten Lankhorst's avatar Maarten Lankhorst Committed by Sumit Semwal
Browse files

dma-buf: remove fallback for !CONFIG_DMA_SHARED_BUFFER 



Documentation says that code requiring dma-buf should add it to
select, so inline fallbacks are not going to be used. A link error
will make it obvious what went wrong, instead of silently doing
nothing at runtime.

Signed-off-by: default avatarMaarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: default avatarRob Clark <rob.clark@linaro.org>
Signed-off-by: default avatarSumit Semwal <sumit.semwal@linaro.org>
parent b6fa0cd6

include/linux/dma-buf.h

+0 −99
Original line number Diff line number Diff line
@@ -156,7 +156,6 @@ static inline void get_dma_buf(struct dma_buf *dmabuf) 
	get_file(dmabuf->file);

}



#ifdef CONFIG_DMA_SHARED_BUFFER

struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,

							struct device *dev);

void dma_buf_detach(struct dma_buf *dmabuf,
@@ -184,103 +183,5 @@ int dma_buf_mmap(struct dma_buf *, struct vm_area_struct *, 
		 unsigned long);

void *dma_buf_vmap(struct dma_buf *);

void dma_buf_vunmap(struct dma_buf *, void *vaddr);

#else



static inline struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf,

							struct device *dev)

{

	return ERR_PTR(-ENODEV);

}



static inline void dma_buf_detach(struct dma_buf *dmabuf,

				  struct dma_buf_attachment *dmabuf_attach)

{

	return;

}



static inline struct dma_buf *dma_buf_export(void *priv,

					     const struct dma_buf_ops *ops,

					     size_t size, int flags)

{

	return ERR_PTR(-ENODEV);

}



static inline int dma_buf_fd(struct dma_buf *dmabuf, int flags)

{

	return -ENODEV;

}



static inline struct dma_buf *dma_buf_get(int fd)

{

	return ERR_PTR(-ENODEV);

}



static inline void dma_buf_put(struct dma_buf *dmabuf)

{

	return;

}



static inline struct sg_table *dma_buf_map_attachment(

	struct dma_buf_attachment *attach, enum dma_data_direction write)

{

	return ERR_PTR(-ENODEV);

}



static inline void dma_buf_unmap_attachment(struct dma_buf_attachment *attach,

			struct sg_table *sg, enum dma_data_direction dir)

{

	return;

}



static inline int dma_buf_begin_cpu_access(struct dma_buf *dmabuf,

					   size_t start, size_t len,

					   enum dma_data_direction dir)

{

	return -ENODEV;

}



static inline void dma_buf_end_cpu_access(struct dma_buf *dmabuf,

					  size_t start, size_t len,

					  enum dma_data_direction dir)

{

}



static inline void *dma_buf_kmap_atomic(struct dma_buf *dmabuf,

					unsigned long pnum)

{

	return NULL;

}



static inline void dma_buf_kunmap_atomic(struct dma_buf *dmabuf,

					 unsigned long pnum, void *vaddr)

{

}



static inline void *dma_buf_kmap(struct dma_buf *dmabuf, unsigned long pnum)

{

	return NULL;

}



static inline void dma_buf_kunmap(struct dma_buf *dmabuf,

				  unsigned long pnum, void *vaddr)

{

}



static inline int dma_buf_mmap(struct dma_buf *dmabuf,

			       struct vm_area_struct *vma,

			       unsigned long pgoff)

{

	return -ENODEV;

}



static inline void *dma_buf_vmap(struct dma_buf *dmabuf)

{

	return NULL;

}



static inline void dma_buf_vunmap(struct dma_buf *dmabuf, void *vaddr)

{

}

#endif /* CONFIG_DMA_SHARED_BUFFER */



#endif /* __DMA_BUF_H__ */