Hi, I made patches to unify crash_32/64.c. There are three patches; 1. add lapic_shutdown for x86_64 2. add safe_smp_processor_id for x86_64 3. unify crash_32/64.c I'm not sure that it's good to split to these patches. I've compiled on both of 32bit and 64bit, and tested kdump on 64bit. Thanks Hiroshi Shimamoto