Modules not working (missing uvmexp_pagesize)

[Julio Merino <jmmv%julipedia.org@localhost>]

Hello Masao and current-users,

Your changes on September 14th to only export relevant uvm symbols to
userspace seem to have broken modules in, at least, macppc.

When the kernel attempts to load a module (e.g. compat, which happens
all the time), I get:

kobj_checksyms, 867: [compat]: linker error: symbol 'uvmexp_pagesize'
not found
WARNING: module error: unable to affix module 'compat'

MIN_PAGE_SIZE and MAX_PAGE_SIZE are *not* defined in macppc, but they
are in other powerpc platforms.  This may be causing some of the
uvm_param.h logic to get confused.

Could you please take a look?

Thank you,
Julio