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dma-mapping: remove dmam_{declare,release}_coherent_memory 

These functions have never been used.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2018-12-26 07:51:44 +01:00
parent d7076f0784
commit 4788ba5792
3 changed files with 0 additions and 75 deletions
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1
Documentation/driver-model/devres.txt
View File

@ -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()

19
include/linux/dma-mapping.h
View File

@ -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)
{

55
kernel/dma/mapping.c
View File

@ -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.
*/