System clock change notification

[John Layt]

We've long had various bugs filed for our software clocks not properly syncing 
when the Linux system clock changes, and we've always wanted some way to be 
notified when changes did occur instead of having to always poll for them.

Thanks to a blog on Planet Gnome [1] I've found out that apparently the kernel 
recently aquired a new api for notifiying userspace when the system clock has 
changed [2] and which Gnome is now implementing support for [3].

Not being too clued up on how we would hook this all up (Solid I guess?) I 
just thought I'd bring it to attention and see if anyone knows anymore or 
wants to take it forward.

Cheers!

John.

[1] http://blog.verbum.org/2011/08/22/why-i-joined-gnome-fixing-the-clocks/
[2] http://lwn.net/Articles/432395/
[3] https://bugzilla.gnome.org/show_bug.cgi?id=655129