The 5.6-rc2 kernel prepatch is out for
testing. Linus says: “More than half the rc2 patch is actually
Documentation updates, because the kvm docs got turned into RST.

Another notable chunk is just tooling updates, which is about 50/50
perf updates (much of it due to header file syncing) and – again –
kvm“.

Source: LWN.net – Kernel prepatch 5.6-rc2