> It is now an invariant that VMA_IO_BIT is not set except by kernel-owned > 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 kernel-owned or fixed mapping. > > Update a number of callsites which already explicitly handle hugetlb > mappings. > > vma_supports_mlock() and ksm_compatible() also explicitly bail on droppable > mappings - detecting kernel-owned, fixed or droppable mappings is handled > by vma_is_persistent(), so in these cases use this predicate. > > should_skip_vma() tests for locked, kernel-owned or fixed memory (having > already excluded hugetlb mappings) so simply test for those there. > > No functional change intended. > > 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/20260914-b4-mmap-prepare-vma-flag-sanify-v2-0-7d9781ed5...@kernel.org?part=34
