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ARM/dma-mapping: remove the unused virt_to_dma helper

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virt_to_dma was only used by the now removed dmabounce code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Christoph Hellwig 2022-04-19 09:43:48 +02:00
parent 5ed390e5a9
commit d6e2e92597
1 changed files with 1 additions and 9 deletions
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10
arch/arm/include/asm/dma-direct.h
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@ -5,7 +5,7 @@
#include <asm/memory.h>
/*
* dma_to_pfn/pfn_to_dma/virt_to_dma are architecture private
* dma_to_pfn/pfn_to_dma are architecture private
* functions used internally by the DMA-mapping API to provide DMA
* addresses. They must not be used by drivers.
*/
@ -25,14 +25,6 @@ static inline unsigned long dma_to_pfn(struct device *dev, dma_addr_t addr)
return pfn;
}
static inline dma_addr_t virt_to_dma(struct device *dev, void *addr)
{
if (dev)
return pfn_to_dma(dev, virt_to_pfn(addr));
return (dma_addr_t)__virt_to_bus((unsigned long)(addr));
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
unsigned int offset = paddr & ~PAGE_MASK;