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iommu/dma: Cleanup dma-iommu.h

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No need for a __KERNEL__ guard outside uapi and add a missing comment
describing the #else cpp statement.  Last but not least include
<linux/errno.h> instead of the asm version, which is frowned upon.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Christoph Hellwig 2019-05-20 09:29:26 +02:00 • committed by Joerg Roedel
parent cd6c84d8f0
commit 185da893fa
1 changed files with 2 additions and 4 deletions
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6
include/linux/dma-iommu.h
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@ -16,9 +16,8 @@
#ifndef __DMA_IOMMU_H #ifndef __DMA_IOMMU_H
#define __DMA_IOMMU_H #define __DMA_IOMMU_H
#ifdef __KERNEL__ #include <linux/errno.h>
#include <linux/types.h> #include <linux/types.h>
#include <asm/errno.h>
#ifdef CONFIG_IOMMU_DMA #ifdef CONFIG_IOMMU_DMA
#include <linux/dma-mapping.h> #include <linux/dma-mapping.h>
@ -86,7 +85,7 @@ void iommu_dma_compose_msi_msg(struct msi_desc *desc,
void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list); void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list);
#else #else /* CONFIG_IOMMU_DMA */
struct iommu_domain; struct iommu_domain;
struct msi_desc; struct msi_desc;
@ -128,5 +127,4 @@ static inline void iommu_dma_get_resv_regions(struct device *dev, struct list_he
} }
#endif /* CONFIG_IOMMU_DMA */ #endif /* CONFIG_IOMMU_DMA */
#endif /* __KERNEL__ */
#endif /* __DMA_IOMMU_H */ #endif /* __DMA_IOMMU_H */