Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions

[PATCH v2 0/6] introduce vm_flags modifier functions · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
[PATCH v2 3/6] mm: replace vma->vm_flags direct modifications with modifier calls · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 3/6] mm: replace vma->vm_flags direct modifications with modifier calls · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 3/6] mm: replace vma->vm_flags direct modifications with modifier calls · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 3/6] mm: replace vma->vm_flags direct modifications with modifier calls · Mike Rapoport <rppt@kernel.org> · 2023-01-26
Re: [PATCH v2 3/6] mm: replace vma->vm_flags direct modifications with modifier calls · Sebastian Reichel <hidden> · 2023-01-26
[PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Peter Zijlstra <peterz@infradead.org> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Matthew Wilcox <willy@infradead.org> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Matthew Wilcox <willy@infradead.org> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Mike Rapoport <rppt@kernel.org> · 2023-01-26
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Mike Rapoport <rppt@kernel.org> · 2023-01-26
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Matthew Wilcox <willy@infradead.org> · 2023-01-26
Re: [PATCH v2 1/6] mm: introduce vma->vm_flags modifier functions · Suren Baghdasaryan <surenb@google.com> · 2023-01-26
[PATCH v2 2/6] mm: replace VM_LOCKED_CLEAR_MASK with VM_LOCKED_MASK · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 2/6] mm: replace VM_LOCKED_CLEAR_MASK with VM_LOCKED_MASK · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 2/6] mm: replace VM_LOCKED_CLEAR_MASK with VM_LOCKED_MASK · Mike Rapoport <rppt@kernel.org> · 2023-01-26
[PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 4/6] mm: replace vma->vm_flags indirect modification in ksm_madvise · Mike Rapoport <rppt@kernel.org> · 2023-01-26
[PATCH v2 6/6] mm: export dump_mm() · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 6/6] mm: export dump_mm() · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 6/6] mm: export dump_mm() · Mike Rapoport <rppt@kernel.org> · 2023-01-26
[PATCH v2 5/6] mm: introduce mod_vm_flags_nolock and use it in untrack_pfn · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 5/6] mm: introduce mod_vm_flags_nolock and use it in untrack_pfn · Michal Hocko <mhocko@suse.com> · 2023-01-25
Re: [PATCH v2 5/6] mm: introduce mod_vm_flags_nolock and use it in untrack_pfn · Suren Baghdasaryan <surenb@google.com> · 2023-01-25
Re: [PATCH v2 5/6] mm: introduce mod_vm_flags_nolock and use it in untrack_pfn · Mike Rapoport <rppt@kernel.org> · 2023-01-26

From: Peter Zijlstra <peterz@infradead.org>
Date: 2023-01-25 09:11:21
Also in: alsa-devel, amd-gfx, bpf, dmaengine, dri-devel, intel-gfx, kexec, kvm, linux-acpi, linux-arch, linux-arm-msm, linux-crypto, linux-ext4, linux-fsdevel, linux-media, linux-mediatek, linux-mm, linux-perf-users, linux-rdma, linux-s390, linux-samsung-soc, linux-scsi, linux-staging, linux-tegra, linux-um, linux-usb, linux-xfs, linuxppc-dev, lkml, loongarch, netdev, nvdimm, selinux, sparclinux, target-devel, virtualization, xen-devel

On Wed, Jan 25, 2023 at 12:38:46AM -0800, Suren Baghdasaryan wrote:

quoted hunk ↗ jump to hunk

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 2d6d790d9bed..6c7c70bf50dd 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h

@@ -491,7 +491,13 @@ struct vm_area_struct {
 	 * See vmf_insert_mixed_prot() for discussion.
 	 */
 	pgprot_t vm_page_prot;
-	unsigned long vm_flags;		/* Flags, see mm.h. */
+
+	/*
+	 * Flags, see mm.h.
+	 * WARNING! Do not modify directly.
+	 * Use {init|reset|set|clear|mod}_vm_flags() functions instead.
+	 */
+	unsigned long vm_flags;

We have __private and ACCESS_PRIVATE() to help with enforcing this.

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