Need a brief idea about Linux Kernel 4.0 Features

What is the code name of the new Linux 4.0? Can I install Kernel updates without reboot? Is there any improvement on Skylake?Is Intel Quark SoC x86 Platform supported for Kernel 4.0? Describe about F2FS, BtrfFS file systems. What are HID driver tweaks? Is there any improvement Radeon DRM driver? How does Live kernel patching infrastructure work? What is Logitech HID++? Is it supported Kernel 4.0? How does staging driver patch for Linux Kernel 4.0? Thank You
