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authorChristoph Hellwig <hch@lst.de>2018-12-26 07:51:44 +0100
committerChristoph Hellwig <hch@lst.de>2019-01-04 09:03:17 +0100
commit4788ba5792cc1368ba4867e1488dc168b4fe97b7 (patch)
tree208b62cf9a875fb168d311a9729ed612b7ecb886
parentd7076f07840851bbe57cb21ba052d6a4a9b1efa9 (diff)
downloadlinux-4788ba5792cc1368ba4867e1488dc168b4fe97b7.tar.bz2
dma-mapping: remove dmam_{declare,release}_coherent_memory
These functions have never been used. Signed-off-by: Christoph Hellwig <hch@lst.de>
-rw-r--r--Documentation/driver-model/devres.txt1
-rw-r--r--include/linux/dma-mapping.h19
-rw-r--r--kernel/dma/mapping.c55
3 files changed, 0 insertions, 75 deletions
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 841c99529d27..b277cafce71e 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -250,7 +250,6 @@ DMA
dmaenginem_async_device_register()
dmam_alloc_coherent()
dmam_alloc_attrs()
- dmam_declare_coherent_memory()
dmam_free_coherent()
dmam_pool_create()
dmam_pool_destroy()
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index fa2ebe8ad4d0..937c2a949fca 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -691,25 +691,6 @@ static inline void dmam_free_coherent(struct device *dev, size_t size,
void *vaddr, dma_addr_t dma_handle) { }
#endif /* !CONFIG_HAS_DMA */
-#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
-extern int dmam_declare_coherent_memory(struct device *dev,
- phys_addr_t phys_addr,
- dma_addr_t device_addr, size_t size,
- int flags);
-extern void dmam_release_declared_memory(struct device *dev);
-#else /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
-static inline int dmam_declare_coherent_memory(struct device *dev,
- phys_addr_t phys_addr, dma_addr_t device_addr,
- size_t size, gfp_t gfp)
-{
- return 0;
-}
-
-static inline void dmam_release_declared_memory(struct device *dev)
-{
-}
-#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
-
static inline void *dmam_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)
{
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index f00544cda4e9..a11006b6d8e8 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -105,61 +105,6 @@ void *dmam_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle,
}
EXPORT_SYMBOL(dmam_alloc_attrs);
-#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
-
-static void dmam_coherent_decl_release(struct device *dev, void *res)
-{
- dma_release_declared_memory(dev);
-}
-
-/**
- * dmam_declare_coherent_memory - Managed dma_declare_coherent_memory()
- * @dev: Device to declare coherent memory for
- * @phys_addr: Physical address of coherent memory to be declared
- * @device_addr: Device address of coherent memory to be declared
- * @size: Size of coherent memory to be declared
- * @flags: Flags
- *
- * Managed dma_declare_coherent_memory().
- *
- * RETURNS:
- * 0 on success, -errno on failure.
- */
-int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
- dma_addr_t device_addr, size_t size, int flags)
-{
- void *res;
- int rc;
-
- res = devres_alloc(dmam_coherent_decl_release, 0, GFP_KERNEL);
- if (!res)
- return -ENOMEM;
-
- rc = dma_declare_coherent_memory(dev, phys_addr, device_addr, size,
- flags);
- if (!rc)
- devres_add(dev, res);
- else
- devres_free(res);
-
- return rc;
-}
-EXPORT_SYMBOL(dmam_declare_coherent_memory);
-
-/**
- * dmam_release_declared_memory - Managed dma_release_declared_memory().
- * @dev: Device to release declared coherent memory for
- *
- * Managed dmam_release_declared_memory().
- */
-void dmam_release_declared_memory(struct device *dev)
-{
- WARN_ON(devres_destroy(dev, dmam_coherent_decl_release, NULL, NULL));
-}
-EXPORT_SYMBOL(dmam_release_declared_memory);
-
-#endif
-
/*
* Create scatter-list for the already allocated DMA buffer.
*/