What
We plan to change the API so it takes 6th argument pointing to current hash value.
This way the API will be able to carry a GHASH update operation.
If the pointer is NULL then the new API will behave as today (assume current hash value is zero).

Impact
Any application using this API will need to be modified to accommodate the change (at least pass 6th argument with NULL).
This requires application recompilation and ABI incompatibility for this API.

Action
We are not aware of any applications that would be impacted by this change.
If you know of any then let us know by replying here.