Copyright and licensing questions

[Mike Mason <mmlnx@xxxxxxxxxx>]

I'm almost done with a patch to the Linux PMDA that includes the following:

1) Changes to existing files.
2) New files.
3) A slightly modified file (ksym.c) from procps that was released under 
the LGPL.  I'm using functions in this file to get the wchan symbol name 
from System.map.
A couple questions...  Does the copyright on the new files get assigned 
to SGI upon submission?  I assume the answer is yes.  Can we legally use 
a file released under LGPL in a GPL project?  If not, I need to write my 
own System.map search routines.
Mike