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v0.7.0
https://github.com/torvalds/linux
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Tip revision: e22ce8eb631bdc47a4a4ea7ecf4e4ba499db4f93 authored by Linus Torvalds on 22 August 2021, 21:24:56 UTC
Linux 5.14-rc7
Tip revision: e22ce8e
dma.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef DMA_H
#define DMA_H

#include <asm/glue-cache.h>

#ifndef MULTI_CACHE
#define dmac_map_area			__glue(_CACHE,_dma_map_area)
#define dmac_unmap_area 		__glue(_CACHE,_dma_unmap_area)

/*
 * These are private to the dma-mapping API.  Do not use directly.
 * Their sole purpose is to ensure that data held in the cache
 * is visible to DMA, or data written by DMA to system memory is
 * visible to the CPU.
 */
extern void dmac_map_area(const void *, size_t, int);
extern void dmac_unmap_area(const void *, size_t, int);

#else

/*
 * These are private to the dma-mapping API.  Do not use directly.
 * Their sole purpose is to ensure that data held in the cache
 * is visible to DMA, or data written by DMA to system memory is
 * visible to the CPU.
 */
#define dmac_map_area			cpu_cache.dma_map_area
#define dmac_unmap_area 		cpu_cache.dma_unmap_area

#endif

#endif
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