aboutsummaryrefslogtreecommitdiffstats
path: root/lib
diff options
context:
space:
mode:
Diffstat (limited to 'lib')
-rw-r--r--lib/iommu-helper.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c
index a3b8d4c3f77a..889ddce2021e 100644
--- a/lib/iommu-helper.c
+++ b/lib/iommu-helper.c
@@ -80,3 +80,11 @@ void iommu_area_free(unsigned long *map, unsigned long start, unsigned int nr)
80 } 80 }
81} 81}
82EXPORT_SYMBOL(iommu_area_free); 82EXPORT_SYMBOL(iommu_area_free);
83
84unsigned long iommu_num_pages(unsigned long addr, unsigned long len)
85{
86 unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE);
87
88 return size >> PAGE_SHIFT;
89}
90EXPORT_SYMBOL(iommu_num_pages);