Crying (J.J. Cale)

Not many would kick off an album with this sad and simple "reggae" ditty...?

Anyway, not much for me to say, but I'll say it anyway.

To me this just stays on the one... which is Gm, upstrummed on the high strings (like xxx333, for example).

The bas(s)ic bass riff is:
G.. D.. F G x
...where the x denotes a muted note.