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

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