Cregit: Linux 5.1: dma-mapping.h

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Stefano Stabellini	34	53.12%	2	28.57%
Catalin Marinas	24	37.50%	1	14.29%
Bart Van Assche	4	6.25%	2	28.57%
Christoph Hellwig	2	3.12%	2	28.57%
Total	64		7

/*
 * Copyright (C) 2012 ARM Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __ASM_DMA_MAPPING_H
#define __ASM_DMA_MAPPING_H

#ifdef __KERNEL__

#include <linux/types.h>
#include <linux/vmalloc.h>

#include <xen/xen.h>
#include <asm/xen/hypervisor.h>

static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
{
	return NULL;
}

/*
 * Do not use this function in a driver, it is only provided for
 * arch/arm/mm/xen.c, which is used by arm64 as well.
 */
static inline bool is_device_dma_coherent(struct device *dev)
{
	return dev->dma_coherent;
}

#endif	/* __KERNEL__ */
#endif	/* __ASM_DMA_MAPPING_H */