Hi, I'd like advice on changing the implementation of smp_processor_id on Cavium specifically and/or MIPS generally. Currently we have: arch/mips/include/asm/smp.h #define raw_smp_processor_id() (current_thread_info()->cpu) A co-worker has an issue where the current thread pointer is corrupted on a Cavium MIPS system running 2.6.14 (but the same code exists in 2.6.31). During the resulting panic() the kernel calls smp_processor_id() which dereferences the corrupt task pointer again - ouch. I've notice that other arches have raw_smp_processor_id() defined to - a platform specific register read, or - a percpu variable or - have a hard_smp_processor_id() defined This last one is presumably for times when you don't trust the kernel data structures to be sane. I can create a patch that calls cvmx_get_core_num(); for cavium. Is there a more generic way to get the cpu number on MIPS? Thanks, -- ../Randy/..
