It's a known issue that the rt2500 module doesn't support SMP. From the CHANGELOG in the source tarball: CURRENTLY NOT SUPPORTED * SMP Processors and Kernels (1099089) * USB rt2500 devices (1090960) * Bridging with other interfaces Reproducible: Always Steps to Reproduce: 1. emerge rt2500 with an SMP kernel 2. 3. Actual Results: emerge allowed Expected Results: Forbid the installation or at least a warning about SMP not being supported by the module
thanks, fixed