Kernel prepatch 5.7-rc5

The 5.7-rc5 kernel prepatch is out fortesting. "We'll see what the next few weeks bring, but at least for now it allfeels normal, and like the 5.7 release is tracking well.So please keep testing, and if you haven't dared a 5.7 pre-releasekernel yet, we're well into the 'things look calm and safe to test'time."