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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-31 12:38:04 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-31 12:38:04 +0200 |
| commit | 5fbf24659b75356e2142e1f1b88f67b34cbc3e75 (patch) | |
| tree | 0e470e4cc89b72e3d74939f8c39396a6a0bebb3a /lib/iommu-helper.c | |
| parent | d89961e2dc87b6e30b8e3f60bd2af5cd92cf4643 (diff) | |
| parent | 6e86841d05f371b5b9b86ce76c02aaee83352298 (diff) | |
Merge branch 'linus' into x86/xen
Diffstat (limited to 'lib/iommu-helper.c')
| -rw-r--r-- | lib/iommu-helper.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/iommu-helper.c b/lib/iommu-helper.c index a3b8d4c3f77..889ddce2021 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) } } EXPORT_SYMBOL(iommu_area_free); + +unsigned long iommu_num_pages(unsigned long addr, unsigned long len) +{ + unsigned long size = roundup((addr & ~PAGE_MASK) + len, PAGE_SIZE); + + return size >> PAGE_SHIFT; +} +EXPORT_SYMBOL(iommu_num_pages); |