Re: [PATCH v4] mm/userfaultfd: fix hugetlb fault mutex hash calculation

[Jianhui Zhou]

On Tue, Mar 25, 2026 at 01:06:00AM +0000, SeongJae Park wrote:
> Seems userfaulfd.c is the only caller of the new helper function.  Why don't
> you define the function in userfaultfd.c ?
I kept hugetlb_linear_page_index() in include/linux/hugetlb.h because
this is hugetlb-specific logic, not userfaultfd-specific logic.

The goal was simply to avoid open-coding the hugetlb index conversion
outside hugetlb code and to make the unit change explicit at the call site.