[Crash-utility] mm_struct for exiting tasks

[Justin Vreeland]

Hello,

I'm Justin Vreeland, I'm currently and intern at Cray working with the 
OS/Kernel group.  We use crash frequently to track down various problems 
and sometimes we need to get information about tasks that were exiting 
when the dump was taken.  Because the mm_struct has been removed from 
the task struct. Crash doesn't let you use vtop or vm to do this so I 
added a way to specify mm_struct (with -M) for tasks whose stats is 
'Exiting'.

Currently it's a bit hackish it modifies the tasks status and context to 
pass all the checks, and then restores both before returning.  If this 
is something you're interested in it I'd be happy to bring it up to 
snuff. Modifications are attached.

-- 
-Justin

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