https://lwn.net/Articles/980665/
hugetlb pagewalk unification [LWN.net]
unificationlwn
https://android.googlesource.com/kernel/common/+/2506378791654badf0ade120478ee70439c410e3/mm/pagewalk.c
mm/pagewalk.c - kernel/common - Git at Google
mmckernelgitgoogle