IOMMU_POOL_HASHBITS
#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS)
per_cpu(iommu_pool_hash, i) = hash_32(i, IOMMU_POOL_HASHBITS);
#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS)
per_cpu(iommu_hash_common, i) = hash_32(i, IOMMU_POOL_HASHBITS);