[PATCH OLK-6.6 0/3]Backport per-vma locks in userfaultfd for OLK 6.6

Backport per-vma locks in userfaultfd[1] for OLK 6.6 Lokesh Gidra (3): userfaultfd: protect mmap_changing with rw_sem in userfaulfd_ctx mm: add vma_assert_locked() for !CONFIG_PER_VMA_LOCK userfaultfd: use per-vma locks in userfaultfd operations fs/userfaultfd.c | 35 ++-- include/linux/mm.h | 5 + include/linux/userfaultfd_k.h | 24 ++- include/linux/userfaultfd_k_ext.h | 7 + mm/userfaultfd.c | 273 ++++++++++++++++++++---------- 5 files changed, 226 insertions(+), 118 deletions(-) -- 2.43.0