+ mm-for-config_per_vma_lock-equate-write-lock-assertion-for-vma-and-mmap.patch added to mm-unstable branch

+ mm-for-config_per_vma_lock-equate-write-lock-assertion-for-vma-and-mmap.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm: for !CONFIG_PER_VMA_LOCK equate write lock assertion for vma and mmap
has been added to the -mm mm-unstable branch.  Its filename is
     mm-for-config_per_vma_lock-equate-write-lock-assertion-for-vma-and-mmap.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-for-config_per_vma_lock-equate-write-lock-assertion-for-vma-and-mmap.patch

This patch will later appear in the mm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Suren Baghdasaryan <surenb@google.com>
Subject: mm: for !CONFIG_PER_VMA_LOCK equate write lock assertion for vma and mmap
Date: Fri, 4 Aug 2023 08:27:20 -0700

When CONFIG_PER_VMA_LOCK=n, vma_assert_write_locked() should be equivalent
to mmap_assert_write_locked().

Link: https://lkml.kernel.org/r/20230804152724.3090321-3-surenb@google.com
Suggested-by: Jann Horn <jannh@google.com>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Linus Torvalds <torvalds@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/mm.h |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/include/linux/mm.h~mm-for-config_per_vma_lock-equate-write-lock-assertion-for-vma-and-mmap
+++ a/include/linux/mm.h
@@ -761,7 +761,8 @@ static inline bool vma_start_read(struct
 		{ return false; }
 static inline void vma_end_read(struct vm_area_struct *vma) {}
 static inline void vma_start_write(struct vm_area_struct *vma) {}
-static inline void vma_assert_write_locked(struct vm_area_struct *vma) {}
+static inline void vma_assert_write_locked(struct vm_area_struct *vma)
+		{ mmap_assert_write_locked(vma->vm_mm); }
 static inline void vma_mark_detached(struct vm_area_struct *vma,
 				     bool detached) {}
 
_

Patches currently in -mm which might be from surenb@google.com are

mm-enable-page-walking-api-to-lock-vmas-during-the-walk.patch
swap-remove-remnants-of-polling-from-read_swap_cache_async.patch
mm-add-missing-vm_fault_result_trace-name-for-vm_fault_completed.patch
mm-drop-per-vma-lock-when-returning-vm_fault_retry-or-vm_fault_completed.patch
mm-change-folio_lock_or_retry-to-use-vm_fault-directly.patch
mm-handle-swap-page-faults-under-per-vma-lock.patch
mm-handle-userfaults-under-vma-lock.patch
mm-handle-userfaults-under-vma-lock-fix.patch
mm-for-config_per_vma_lock-equate-write-lock-assertion-for-vma-and-mmap.patch
mm-replace-mmap-with-vma-write-lock-assertions-when-operating-on-a-vma.patch
mm-lock-vma-explicitly-before-doing-vm_flags_reset-and-vm_flags_reset_once.patch
mm-always-lock-new-vma-before-inserting-into-vma-tree.patch
mm-move-vma-locking-out-of-vma_prepare-and-dup_anon_vma.patch