Merge remote-tracking branch 'jc_docs/docs-next'

diff --cc Documentation/ABI/testing/sysfs-fs-f2fs
Simple merge

diff --cc Documentation/admin-guide/sysctl/kernel.rst
Simple merge

diff --cc Documentation/virt/kvm/api.rst
Simple merge

diff --cc Documentation/virt/kvm/vcpu-requests.rst
Simple merge

diff --cc include/linux/device.h
Simple merge