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xen/arm: remove xen_dma_ops 

arm and arm64 can just use xen_swiotlb_dma_ops directly like x86, no
need for a pointer indirection.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Julien Grall <julien.grall@arm.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Christoph Hellwig 2019-07-24 14:09:39 +02:00
parent efcd5729d9
commit 0e0d26e779
4 changed files with 4 additions and 8 deletions
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3
arch/arm/mm/dma-mapping.c
View File

@ -36,6 +36,7 @@
#include <asm/mach/map.h>
#include <asm/system_info.h>
#include <asm/dma-contiguous.h>
#include <xen/swiotlb-xen.h>
#include "dma.h"
#include "mm.h"
@ -2315,7 +2316,7 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
#ifdef CONFIG_XEN
if (xen_initial_domain())
dev->dma_ops = xen_dma_ops;
dev->dma_ops = &xen_swiotlb_dma_ops;
#endif
dev->archdata.dma_ops_setup = true;
}

4
arch/arm/xen/mm.c
View File

@ -162,16 +162,12 @@ void xen_destroy_contiguous_region(phys_addr_t pstart, unsigned int order)
}
EXPORT_SYMBOL_GPL(xen_destroy_contiguous_region);
const struct dma_map_ops *xen_dma_ops;
EXPORT_SYMBOL(xen_dma_ops);
int __init xen_mm_init(void)
{
struct gnttab_cache_flush cflush;
if (!xen_initial_domain())
return 0;
xen_swiotlb_init(1, false);
xen_dma_ops = &xen_swiotlb_dma_ops;
cflush.op = 0;
cflush.a.dev_bus_addr = 0;

3
arch/arm64/mm/dma-mapping.c
View File

@ -8,6 +8,7 @@
#include <linux/cache.h>
#include <linux/dma-noncoherent.h>
#include <linux/dma-iommu.h>
#include <xen/swiotlb-xen.h>
#include <asm/cacheflush.h>
@ -52,6 +53,6 @@ void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
#ifdef CONFIG_XEN
if (xen_initial_domain())
dev->dma_ops = xen_dma_ops;
dev->dma_ops = &xen_swiotlb_dma_ops;
#endif
}

2
include/xen/arm/hypervisor.h
View File

@ -19,8 +19,6 @@ static inline enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
return PARAVIRT_LAZY_NONE;
}
extern const struct dma_map_ops *xen_dma_ops;
#ifdef CONFIG_XEN
void __init xen_early_init(void);
#else