[Crash-utility] Fix fatal problems in PPC

Hello Dave, I'm trying to use crash configured with PPC on linux-2.6.27 powerpc. And when crash started with /dev/mem, I found some problems and fixed them. I'm afraid that PPC32 is now not maintained for long time, most people use PPC64 only? I don't know true reason but if possible, please check attached patch set. Report of problems which I met as below: [problem 1] Display type mismatch WARNING WARNING: machine type mismatch: crash utility: PPC vmlinux: (unknown) -> Simply lacking of verification, remove WARNING with 0001 [problem 2] Display vmalloc fault WARNING WARNING: cannot access vmalloc'd module memory -> PTE index was wrong, fix with 0002 [problem 3] Repeat "invalid task address in pid_hash:" 500 times crash: invalid task address in pid_hash: c8818450 -> Alignment check was too old, fix with 0003 [problem 4] bt command is always SEGV while accessing stack frame -> Similar to problem 3, fix with 0004 I continue to test the basic command regressions or update PPC implementation by learning from PPC64. Thanks, Toshi