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iommu/vt-d: Introduce helper function iova_size() to improve code readability

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Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jiang Liu 2014-07-11 14:19:36 +08:00 • committed by Joerg Roedel
parent 162d1b10d4
commit a156ef99e8
2 changed files with 8 additions and 4 deletions
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5
include/linux/iova.h
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@ -34,6 +34,11 @@ struct iova_domain {
unsigned long dma_32bit_pfn;
};
static inline unsigned long iova_size(struct iova *iova)
{
return iova->pfn_hi - iova->pfn_lo + 1;
}
struct iova *alloc_iova_mem(void);
void free_iova_mem(struct iova *iova);
void free_iova(struct iova_domain *iovad, unsigned long pfn);