second thoughts on using dl_iterate_phdr() for cache-validation

[Roland McGrath]

> So when should I check back?

You should take responsibility for the work you want done and continue
improving it until you've submitted a patch that has nothing wrong with it.
Please don't pretend there is some mystery about how to contribute effectively.

> Fine; I don't mind changing it back to "unsigned long int".

What is the documentation about the meaning of the values and the effects
of overflow?