Function start

pub unsafe fn start() -> (&'static Kernel, Platform, &'static Chip, &'static Nrf52840DefaultPeripherals<'static>, &'static MuxAlarm<'static, Rtc<'static>>)

This is in a separate, inline(never) function so that its stack frame is removed when this function returns. Otherwise, the stack space used for these static_inits is wasted.