The third 5.8 kernel prepatch is out for
testing. “Well, we had a big merge window, and we have a fairly big rc3 here
too. The calm period for rc2 is clearly over.

That said, I don’t think there’s anything _particularly_ scary in
here, and the size of this rc is probably simply a direct result of
the fact that 5.8 is a big release.“

Source: LWN.net – Kernel prepatch 5.8-rc3