This patchset was originally published as a part of per-VMA locking [1] and was split after suggestion that it's viable on its own and to facilitate the review process. It is now a preprequisite for the next version of per-VMA lock patchset, which reuses vm_flags modifier functions to lock the VMA when vm_flags are being updated.
VMA vm_flags modifications are usually done under exclusive mmap_lock protection because this attrubute affects other decisions like VMA merging or splitting and races should be prevented. Introduce vm_flags modifier functions to enforce correct locking. The patchset applies cleanly over mm-unstable branch of mm tree. Changes since v3 [2] - Fixed build breakage in nommu.c introduced in previous version, per Andrew Morton - Added back data_race() hint in vm_area_dup, per Mel Gorman - Renamed vm_flags modifiers, per Andrew Morton, Mike Rapoport and Mel Gorman - Changed vm_flags_mod to reset vm_flags with one assignment, per Mel Gorman - Added comments about the need to copy vm_flags before ksm_madvise, per Mel Gorman - Added clarifications for __vm_flags_mod usage, per Mel Gorman [1] https://lore.kernel.org/all/20230109205336.3665937-1-sur...@google.com/ [2] https://lore.kernel.org/lkml/20230125233554.153109-1-sur...@google.com/ Suren Baghdasaryan (7): kernel/fork: convert vma assignment to a memcpy mm: introduce vma->vm_flags wrapper functions mm: replace VM_LOCKED_CLEAR_MASK with VM_LOCKED_MASK mm: replace vma->vm_flags direct modifications with modifier calls mm: replace vma->vm_flags indirect modification in ksm_madvise mm: introduce __vm_flags_mod and use it in untrack_pfn mm: export dump_mm() arch/arm/kernel/process.c | 2 +- arch/ia64/mm/init.c | 8 +-- arch/loongarch/include/asm/tlb.h | 2 +- arch/powerpc/kvm/book3s_hv_uvmem.c | 6 +- arch/powerpc/kvm/book3s_xive_native.c | 2 +- arch/powerpc/mm/book3s64/subpage_prot.c | 2 +- arch/powerpc/platforms/book3s/vas-api.c | 2 +- arch/powerpc/platforms/cell/spufs/file.c | 14 ++--- arch/s390/mm/gmap.c | 9 ++- arch/x86/entry/vsyscall/vsyscall_64.c | 2 +- arch/x86/kernel/cpu/sgx/driver.c | 2 +- arch/x86/kernel/cpu/sgx/virt.c | 2 +- arch/x86/mm/pat/memtype.c | 14 +++-- arch/x86/um/mem_32.c | 2 +- drivers/acpi/pfr_telemetry.c | 2 +- drivers/android/binder.c | 3 +- drivers/char/mspec.c | 2 +- drivers/crypto/hisilicon/qm.c | 2 +- drivers/dax/device.c | 2 +- drivers/dma/idxd/cdev.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c | 2 +- drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 4 +- drivers/gpu/drm/amd/amdkfd/kfd_doorbell.c | 4 +- drivers/gpu/drm/amd/amdkfd/kfd_events.c | 4 +- drivers/gpu/drm/amd/amdkfd/kfd_process.c | 4 +- drivers/gpu/drm/drm_gem.c | 2 +- drivers/gpu/drm/drm_gem_dma_helper.c | 3 +- drivers/gpu/drm/drm_gem_shmem_helper.c | 2 +- drivers/gpu/drm/drm_vm.c | 8 +-- drivers/gpu/drm/etnaviv/etnaviv_gem.c | 2 +- drivers/gpu/drm/exynos/exynos_drm_gem.c | 4 +- drivers/gpu/drm/gma500/framebuffer.c | 2 +- drivers/gpu/drm/i810/i810_dma.c | 2 +- drivers/gpu/drm/i915/gem/i915_gem_mman.c | 4 +- drivers/gpu/drm/mediatek/mtk_drm_gem.c | 2 +- drivers/gpu/drm/msm/msm_gem.c | 2 +- drivers/gpu/drm/omapdrm/omap_gem.c | 3 +- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 3 +- drivers/gpu/drm/tegra/gem.c | 5 +- drivers/gpu/drm/ttm/ttm_bo_vm.c | 3 +- drivers/gpu/drm/virtio/virtgpu_vram.c | 2 +- drivers/gpu/drm/vmwgfx/vmwgfx_ttm_glue.c | 2 +- drivers/gpu/drm/xen/xen_drm_front_gem.c | 3 +- drivers/hsi/clients/cmt_speech.c | 2 +- drivers/hwtracing/intel_th/msu.c | 2 +- drivers/hwtracing/stm/core.c | 2 +- drivers/infiniband/hw/hfi1/file_ops.c | 4 +- drivers/infiniband/hw/mlx5/main.c | 4 +- drivers/infiniband/hw/qib/qib_file_ops.c | 13 ++--- drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 2 +- .../infiniband/hw/vmw_pvrdma/pvrdma_verbs.c | 2 +- .../common/videobuf2/videobuf2-dma-contig.c | 2 +- .../common/videobuf2/videobuf2-vmalloc.c | 2 +- drivers/media/v4l2-core/videobuf-dma-contig.c | 2 +- drivers/media/v4l2-core/videobuf-dma-sg.c | 4 +- drivers/media/v4l2-core/videobuf-vmalloc.c | 2 +- drivers/misc/cxl/context.c | 2 +- drivers/misc/habanalabs/common/memory.c | 2 +- drivers/misc/habanalabs/gaudi/gaudi.c | 4 +- drivers/misc/habanalabs/gaudi2/gaudi2.c | 8 +-- drivers/misc/habanalabs/goya/goya.c | 4 +- drivers/misc/ocxl/context.c | 4 +- drivers/misc/ocxl/sysfs.c | 2 +- drivers/misc/open-dice.c | 4 +- drivers/misc/sgi-gru/grufile.c | 4 +- drivers/misc/uacce/uacce.c | 2 +- drivers/sbus/char/oradax.c | 2 +- drivers/scsi/cxlflash/ocxl_hw.c | 2 +- drivers/scsi/sg.c | 2 +- .../staging/media/atomisp/pci/hmm/hmm_bo.c | 2 +- drivers/staging/media/deprecated/meye/meye.c | 4 +- .../media/deprecated/stkwebcam/stk-webcam.c | 2 +- drivers/target/target_core_user.c | 2 +- drivers/uio/uio.c | 2 +- drivers/usb/core/devio.c | 3 +- drivers/usb/mon/mon_bin.c | 3 +- drivers/vdpa/vdpa_user/iova_domain.c | 2 +- drivers/vfio/pci/vfio_pci_core.c | 2 +- drivers/vhost/vdpa.c | 2 +- drivers/video/fbdev/68328fb.c | 2 +- drivers/video/fbdev/core/fb_defio.c | 4 +- drivers/xen/gntalloc.c | 2 +- drivers/xen/gntdev.c | 4 +- drivers/xen/privcmd-buf.c | 2 +- drivers/xen/privcmd.c | 4 +- fs/aio.c | 2 +- fs/cramfs/inode.c | 2 +- fs/erofs/data.c | 2 +- fs/exec.c | 4 +- fs/ext4/file.c | 2 +- fs/fuse/dax.c | 2 +- fs/hugetlbfs/inode.c | 4 +- fs/orangefs/file.c | 3 +- fs/proc/task_mmu.c | 2 +- fs/proc/vmcore.c | 3 +- fs/userfaultfd.c | 2 +- fs/xfs/xfs_file.c | 2 +- include/linux/mm.h | 58 +++++++++++++++++-- include/linux/mm_types.h | 10 +++- include/linux/pgtable.h | 5 +- kernel/bpf/ringbuf.c | 4 +- kernel/bpf/syscall.c | 4 +- kernel/events/core.c | 2 +- kernel/fork.c | 4 +- kernel/kcov.c | 2 +- kernel/relay.c | 2 +- mm/debug.c | 1 + mm/hugetlb.c | 4 +- mm/madvise.c | 2 +- mm/memory.c | 19 +++--- mm/memremap.c | 4 +- mm/mlock.c | 12 ++-- mm/mmap.c | 32 +++++----- mm/mprotect.c | 2 +- mm/mremap.c | 8 +-- mm/nommu.c | 11 ++-- mm/secretmem.c | 2 +- mm/shmem.c | 2 +- mm/vmalloc.c | 2 +- net/ipv4/tcp.c | 4 +- security/selinux/selinuxfs.c | 6 +- sound/core/oss/pcm_oss.c | 2 +- sound/core/pcm_native.c | 9 +-- sound/soc/pxa/mmp-sspa.c | 2 +- sound/usb/usx2y/us122l.c | 4 +- sound/usb/usx2y/usX2Yhwdep.c | 2 +- sound/usb/usx2y/usx2yhwdeppcm.c | 2 +- 127 files changed, 300 insertions(+), 234 deletions(-) -- 2.39.1
