On Thu Sep 17, 2026 at 12:22 PM EDT, Lorenzo Stoakes (ARM) wrote: > Rather than directly checking VMA flags, use the newly introduced > vma_is_kernel_owned() and vma_is_persistent() helpers in userfaultfd when > assessing VMA suitability for userfaultfd and UFFDIO_MOVE. > > Update vma_move_compatible() so it's expressed in terms of VMA > characteristics rather than arbitrary flags. > > Additionally, update the use of the deprecated VMA flag API when checking > VMA_SHADOW_STACK_BIT. > > A VMA_IO_BIT check is no longer required but that is fine as a hard > invariant has been established that only kernel-owned mappings may set > VMA_IO_BIT so the check is now redundant. > > Signed-off-by: Lorenzo Stoakes (ARM) <[email protected]> > --- > mm/userfaultfd.c | 21 +++++++++++++++------ > 1 file changed, 15 insertions(+), 6 deletions(-) > LGTM.
Acked-by: Zi Yan <[email protected]> -- Best Regards, Yan, Zi
