mesa: use default params for clearbuffer functions
What does this MR do and why?
mesa: use default params for clearbuffer functions
this might otherwise pull in user-specified params
from the unpack buffer and access arbitrary data
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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.