The realtime preemption end game — for real this time

Work on realtime preemption for the Linux kernel got its start almost exactly 20years ago(though it had its roots in earlier work, of course). It is fair to saythat finishing that job has taken a bit longer than anybody involved wouldhave expected. Now, though, Sebastian Andrzej Siewior has posted a briefpatch series making it possible to enable realtime preemption in themainline kernel on three architectures.

With the printk bits merged, PREEMPT_RT could be enabled on X86,ARM64 and Risc-V. These three architectures merged required changesover the years leaving me in a position where I have no essentialchanges in the queue that would affect them.

Congratulations are due to the many developers who have worked on thisproject for the last two decades.