From: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
These helpers are useful for managing additional references taken
on the device from other associated VFIO modules.
Original-patch-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
drivers/vfio/vfio_main.c | 2 ++
include/linux/vfio.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/vfio/vfio_main.c b/drivers/vfio/vfio_main.c
index 5046cae052224..2f0dcec67ffe3 100644
--- a/drivers/vfio/vfio_main.c
+++ b/drivers/vfio/vfio_main.c
@@ -171,11 +171,13 @@ void vfio_device_put_registration(struct vfio_device *device)
if (refcount_dec_and_test(&device->refcount))
complete(&device->comp);
}
+EXPORT_SYMBOL_GPL(vfio_device_put_registration);
bool vfio_device_try_get_registration(struct vfio_device *device)
{
return refcount_inc_not_zero(&device->refcount);
}
+EXPORT_SYMBOL_GPL(vfio_device_try_get_registration);
/*
* VFIO driver API
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index eb563f538dee5..217ba4ef17522 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -297,6 +297,8 @@ static inline void vfio_put_device(struct vfio_device *device)
int vfio_register_group_dev(struct vfio_device *device);
int vfio_register_emulated_iommu_dev(struct vfio_device *device);
void vfio_unregister_group_dev(struct vfio_device *device);
+bool vfio_device_try_get_registration(struct vfio_device *device);
+void vfio_device_put_registration(struct vfio_device *device);
int vfio_assign_device_set(struct vfio_device *device, void *set_id);
unsigned int vfio_device_set_open_count(struct vfio_device_set *dev_set);
--
2.51.0
