From a156ef99e874f3701367cc192aa604bcf8c0a236 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Fri, 11 Jul 2014 14:19:36 +0800 Subject: iommu/vt-d: Introduce helper function iova_size() to improve code readability Signed-off-by: Jiang Liu Signed-off-by: Joerg Roedel --- include/linux/iova.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/iova.h') diff --git a/include/linux/iova.h b/include/linux/iova.h index 3277f4711349..19e81d5ccb6d 100644 --- a/include/linux/iova.h +++ b/include/linux/iova.h @@ -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); -- cgit v1.2.3