Hide uvm/uvm_page.h again to ensure its internal structures are MD.
GENERIC or at least one kernel compile tested for:
acorn26, acorn32, algor, all, alpha, amd64, amiga, amigappc,
arc, bebox, bighill, cats, cobalt, dreamcast, ews4800mips,
hp300, hp700, hpcarm, hpcmips, hpcsh, i386, ibmnws,
integrator, ixm1200, iyonix, landisk, luna68k, mac68k,
macppc, mipsco, mmeye, mvme68k, mvmeppc, netwinder, news68k,
newsmips, next68k, obs266a, ofppc, pmax, pmppc, prep,
rs6000, sandpoint, sbmips, shark, sidebeach, sparc, sparc64,
sun2, sun3, usermode, vax, x68k, zaurus
6d3191d5b6