Comment 2 for bug 1969365

Thanks for the reply, Nick!

I think it's important enough to land because:

* you cannot execute `kexec` correctly on an Ubuntu 20.04 system without this patch (it will fall back to performing a full reboot),
* kexec can be used to reduce downtime for critical systems which take a long time to reboot (e.g. because they have a lot of hardware to initialise), and
* kexec-tools is in main (and has been since at least trusty) which indicates to me that it is expected that kexec will work on Ubuntu

I'd also add that the patch is three lines in a code path which is only used by people opting into using `kexec`, so the potential downside is pretty minimal.

(I'll set the bug back to New for now, until you have a chance to respond.)