> It is now an invariant that VMA_IO_BIT is not set by mm-managed mappings, > so each existing VMA_SPECIAL_FLAGS test need only test for > VMA_DONTEXPAND_BIT, VMA_PFNMAP_BIT and VMA_MIXEDMAP_BIT. > > This is precisely a test for a fixed or non-mm-managed mapping. > > Update a number of callsites which already explicitly handle hugetlb > mappings. > > vma_supports_mlock() and ksm_compatible() also explicitly bail on droppable > mappings - excluding non-mm-managed, fixed or droppable mappings is exactly > what vma_is_mm_backed() tests for, so in these cases use this predicate. > > should_skip_vma() tests for locked, fixed or non-mm-managed memory (having > already excluded hugetlb mappings) so simply test for those there. > > No functional change intended. > > Reviewed-by: Zi Yan <[email protected]> > Signed-off-by: Lorenzo Stoakes (ARM) <[email protected]>
Sashiko has reviewed this patch and found no issues. It looks great! -- Sashiko AI review ยท https://sashiko.dev/#/patchset/20261003-b4-mmap-prepare-vma-flag-sanify-v4-0-a1f052500...@kernel.org?part=33
