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-rw-r--r--arch/powerpc/kernel/iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c
index 0e49a4560cff..e0af6cd7ba4f 100644
--- a/arch/powerpc/kernel/iommu.c
+++ b/arch/powerpc/kernel/iommu.c
@@ -190,7 +190,7 @@ static unsigned long iommu_range_alloc(struct device *dev,
unsigned int pool_nr;
struct iommu_pool *pool;
- align_mask = 0xffffffffffffffffl >> (64 - align_order);
+ align_mask = (1ull << align_order) - 1;
/* This allocator was derived from x86_64's bit string search */