[Crash-utility] crash version 4.0-2.21 is available

[Dave Anderson]

Fix to recognize post-2.6.15 ppc64 kernels moving the per_cpu_offsets
to the "paca" structure.  Without this patch, crash fails with the
following error messages: "crash: cannot determine idle task addresses
from init_tasks[] or runqueues[]" and "crash: cannot resolve
init_task_union".  (pbadari at us.ibm.com)

Incorporated a patch containing ppc64 specific changes when reading
kdump vmcores.  Kdump vmcores contain pt_regs for all cpus in the ELF
header, so they are read from there rather than from the active tasks'
kernel stacks; also, the registers contents are printed before any
active task backtrace.  (haren at us.ibm.com)

If pglist_data.node_mem_map structure member does not exist, as in a
ppc64 kernel built with CONFIG_SPARSEMEM, print an init-time warning
message instead of failing with "crash: invalid structure member
offset: pglist_data.node_mem_map" message.  (haren at us.ibm.com,
anderson at redhat.com)

Download from:  http://people.redhat.com/anderson