Kernel prepatch 5.17-rc1

The first 5.17 kernel prepatch is out fortesting, and the merge window is closed for this release.

5.17 doesn't seem to be slated to be a huge release, and everythinglooks fairly normal. We've got a bit more activity than usual in acouple of corners of the kernel (random number generator and thefscache rewrite stand out), but even with those things, the bigpicture view looks very much normal: the bulk is various driverupdates, with architectures updates, documentation, and toolingbeing the bulk of the rest.