Linux 4.15 rc5

Ok, so it's not Sunday yet, but tomorrow is Christmas Eve, and whileI've been in the US for over two decades, we still celebrate Christmasthe only _right_ way - with Christmas Eve being the big day, andChristmas Day being just for recovery.So I'm doing the rc5 release a day early, in order to not have to doit during the actual Christmas festivities at our house.And it's not like I expect to see a lot of patches or pull requeststomorrow anyway, so I guess it doesn't really much matter when I dothe rc release, the end result would look very similar even if I haddone it on my normal Sunday schedule.This (shortened) week ended up being fairly normal for rc5, with theexception of the ongoing merging of the x86 low-level prep for kernelpage table isolation that continues and is noticeable. In fact, abouta third of the rc5 patch is x86 updates due to that. It all looks likevery good cleanups, though, and it's been through about two hundrediterations by now (no, seriously, Thomas has been keeping track of hisiterative updates of the PTI series, and it apparently hit 196 in thelast two months).Outside of that, things look fairly normal: mostly drivers and somenetworking updates (bpf fixes and selftests are notable). Some xfsfixes also stand out.The appended shortlog gives an overview of the details,