[PATCH 4/5] userfaultfd: wp: add helper for writeprotect check

From: Shaohua Li Patch series "userfaultfd: write protection support", v6. Overview The uffd-wp work was initialized by Shaohua Li [1], and later continued by Andrea [2]. This series is based upon Andrea's latest userfaultfd tree, and it is a continuous works from both Shaohua and And

[PATCH 4/5] userfaultfd: wp: add helper for writeprotect check

From: Shaohua Li Patch series "userfaultfd: write protection support", v6. Overview The uffd-wp work was initialized by Shaohua Li [1], and later continued by Andrea [2]. This series is based upon Andrea's latest userfaultfd tree, and it is a continuous works from both Shaohua and And