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-rw-r--r--arch/sparc/mm/io-unit.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sparc/mm/io-unit.c b/arch/sparc/mm/io-unit.c
index 42c1c700c0a..2bb1309003d 100644
--- a/arch/sparc/mm/io-unit.c
+++ b/arch/sparc/mm/io-unit.c
@@ -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;)