[PATCH v4 36/38] mm: eliminate VM_SPECIAL, VMA_SPECIAL_FLAGS
flat view
WARM2d
REVIEWED: 21 (21M)
From: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
Date: 2026-10-03 16:45:55
Also in:
bpf, fuse-devel, kvm, kvm-riscv, kvmarm, linux-arch, linux-doc, linux-fbdev, linux-fsdevel, linux-mm, linux-perf-users, linux-rdma, linux-s390, linux-scsi, linux-sound, linux-usb, linuxppc-dev, lkml, selinux, sparclinux
Subsystem:
memory management - core, memory mapping, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Liam R. Howlett, Lorenzo Stoakes, Linus Torvalds
2 review trailers (1 from subsystem maintainers).
Every user of the VM_SPECIAL or VMA_SPECIAL_FLAGS has now been converted to predicates which explicitly express what is actually being checked for rather than the nebulous concept of possessing 'special' VMA flags. In any case 'special' is not so special a term of art in mm - it includes VDSO/VVAR mappings, special in the sense of vm_normal_folio() and probably other cases too. Therefore make things less special by eliminating these now unused flags. No functional change intended. Acked-by: Zi Yan <ziy@nvidia.com> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Signed-off-by: Lorenzo Stoakes (ARM) <ljs@kernel.org> --- include/linux/mm.h | 8 -------- tools/testing/vma/include/dup.h | 8 -------- 2 files changed, 16 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 55320cf2c525..7ada0da24d0c 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -576,14 +576,6 @@ enum { #define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC) #define VMA_ACCESS_FLAGS mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT) -/* - * Special vmas that are non-mergable, non-mlock()able. - */ - -#define VMA_SPECIAL_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_DONTEXPAND_BIT, \ - VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT) -#define VM_SPECIAL vma_flags_to_legacy(VMA_SPECIAL_FLAGS) - /* * Physically remapped pages are special. Tell the * rest of the world about it:
diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h
index 94bf818ad0e1..7a6d99ad5303 100644
--- a/tools/testing/vma/include/dup.h
+++ b/tools/testing/vma/include/dup.h@@ -352,14 +352,6 @@ enum { #define VM_ACCESS_FLAGS (VM_READ | VM_WRITE | VM_EXEC) #define VMA_ACCESS_FLAGS mk_vma_flags(VMA_READ_BIT, VMA_WRITE_BIT, VMA_EXEC_BIT) -/* - * Special vmas that are non-mergable, non-mlock()able. - */ -#define VM_SPECIAL (VM_IO | VM_DONTEXPAND | VM_PFNMAP | VM_MIXEDMAP) - -#define VMA_SPECIAL_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_DONTEXPAND_BIT, \ - VMA_PFNMAP_BIT, VMA_MIXEDMAP_BIT) - #define VMA_REMAP_FLAGS mk_vma_flags(VMA_IO_BIT, VMA_PFNMAP_BIT, \ VMA_DONTEXPAND_BIT, VMA_DONTDUMP_BIT)
--
2.55.0