I came up with a scheme for accessing the page tables in page_convert_anon
that should work without requiring locks.  Hugh has looked at it and agrees
it addresses the problems he found.  Anyway, here's the patch.

Dave McCracken

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Dave McCracken          IBM Linux Base Kernel Team      1-512-838-3059
dmccr@us.ibm.com                                        T/L   678-3059