[RFC v1 8/8] iommu: expose the function iommu_device_use_default_domain

[Cindy Lu]

Expose the function iommu_device_use_default_domain() and
iommu_device_unuse_default_domain()，
While vdpa bind the iommufd device and detach the iommu device,
vdpa need to call the function
iommu_device_unuse_default_domain() to release the owner

Signed-off-by: Cindy Lu <lulu@xxxxxxxxxx>
---
 drivers/iommu/iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c
index 3bfc56df4f78..987cbf8c9a87 100644
--- a/drivers/iommu/iommu.c
+++ b/drivers/iommu/iommu.c
@@ -3164,6 +3164,7 @@ int iommu_device_use_default_domain(struct device *dev)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(iommu_device_use_default_domain);
 
 /**
  * iommu_device_unuse_default_domain() - Device driver stops handling device
@@ -3187,6 +3188,7 @@ void iommu_device_unuse_default_domain(struct device *dev)
 	mutex_unlock(&group->mutex);
 	iommu_group_put(group);
 }
+EXPORT_SYMBOL_GPL(iommu_device_unuse_default_domain);
 
 static int __iommu_group_alloc_blocking_domain(struct iommu_group *group)
 {
-- 
2.34.3