Signed-off-by: David S. Miller <davem@davemloft.net>
@@ -64,6 +64,7 @@ iounit_init(int sbi_node, int io_node, struct sbus_bus *sbus)
sbus->iommu = (struct iommu_struct *)iounit;
iounit->page_table = xpt;
+ spin_lock_init(&iounit->lock);
for (xptend = iounit->page_table + (16 * PAGE_SIZE) / sizeof(iopte_t);
xpt < xptend;)