[arch-general] Upgrading from linux 4.0.0 to 4.0.1 without reboot

[Chi Hsuan Yen]

Hello Arch users,

I just upgraded to linux 4.0.1-1 in [core] from linux 4.0.0-2 in [testing].
In recent days, I've heard of lots of news that since kernel 4.0, no reboot
is necessary for upgrading kernel. However, uname still gives me the old
kernel version:

$ uname -r
4.0.0-2-ARCH

Is it necessary to run additional commands for completing kernel upgrading,
or do I have to wait for some time? If I have to wait, how long should I
wait for?

Thanks for any related information or opinions!

Best Regards,

Yen Chi Hsuan