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Commit 1fa06824 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

dma-mapping: remove dma_release_declared_memory 



This function is entirely unused given that declared memory is
generally provided by platform setup code.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
parent 212836a9

Documentation/DMA-API.txt

+0 −11
Original line number Diff line number Diff line
@@ -603,17 +603,6 @@ For reasons of efficiency, most platforms choose to track the declared 
region only at the granularity of a page.  For smaller allocations,

you should use the dma_pool() API.



::



	void

	dma_release_declared_memory(struct device *dev)



Remove the memory region previously declared from the system.  This

API performs *no* in-use checking for this region and will return

unconditionally having removed all the required structures.  It is the

driver's job to ensure that no parts of this memory region are

currently in use.



Part III - Debug drivers use of the DMA-API

-------------------------------------------

include/linux/dma-mapping.h

+0 −6
Original line number Diff line number Diff line
@@ -764,7 +764,6 @@ static inline int dma_get_cache_alignment(void) 
#ifdef CONFIG_DMA_DECLARE_COHERENT

int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,

				dma_addr_t device_addr, size_t size);

void dma_release_declared_memory(struct device *dev);

#else

static inline int

dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
@@ -772,11 +771,6 @@ dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, 
{

	return -ENOSYS;

}



static inline void

dma_release_declared_memory(struct device *dev)

{

}

#endif /* CONFIG_DMA_DECLARE_COHERENT */



static inline void *dmam_alloc_coherent(struct device *dev, size_t size,

kernel/dma/coherent.c

+0 −11
Original line number Diff line number Diff line
@@ -124,17 +124,6 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr, 
}

EXPORT_SYMBOL(dma_declare_coherent_memory);



void dma_release_declared_memory(struct device *dev)

{

	struct dma_coherent_mem *mem = dev->dma_mem;



	if (!mem)

		return;

	dma_release_coherent_memory(mem);

	dev->dma_mem = NULL;

}

EXPORT_SYMBOL(dma_release_declared_memory);



static void *__dma_alloc_from_coherent(struct dma_coherent_mem *mem,

		ssize_t size, dma_addr_t *dma_handle)

{