Hi root, just a few questions here. Since when did you start getting this error? did you add any hardware/software to your system? IRQ 7 is usually for a parallel port (LPT1) I/O Address 378h. So, if your system is complaining in IRQ 7, I'd check what device is using or conflicting with it. Also, like trickykid suggested check your /proc directory for additional information or clues.
good luck!