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: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Rob Clark <rob.clark@linaro.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>

diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index eb48f38..bd2e52c 100644 (file)
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -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__ */