BPF and lazy preemption.

[Usama Saqib <usama.saqib@xxxxxxxxxxxxx>]

Hello,

I hope everyone is doing well. It seems that work has started to
introduce a new preemption model in the linux kernel PREEMPT_LAZY [1].
According to the mailing list, the maintainers intend for this to
replace PREEMPT_NONE and PREEMPT_VOLUTARY as the default preemption
model.