The patch titled
Subject: mm: add vma_assert_locked() for !CONFIG_PER_VMA_LOCK
has been added to the -mm mm-unstable branch. Its filename is
mm-add-vma_assert_locked-for-config_per_vma_lock.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-add-vma_assert_locked-for-config_per_vma_lock.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: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
Subject: mm: add vma_assert_locked() for !CONFIG_PER_VMA_LOCK
Date: Thu, 15 Feb 2024 10:27:55 -0800
vma_assert_locked() is needed to replace mmap_assert_locked() once we
start using per-vma locks in userfaultfd operations.
In !CONFIG_PER_VMA_LOCK case when mm is locked, it implies that the given
VMA is locked.
Link: https://lkml.kernel.org/r/20240215182756.3448972-4-lokeshgidra@xxxxxxxxxx
Signed-off-by: Lokesh Gidra <lokeshgidra@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Axel Rasmussen <axelrasmussen@xxxxxxxxxx>
Cc: Brian Geffon <bgeffon@xxxxxxxxxx>
Cc: David Hildenbrand <david@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Kalesh Singh <kaleshsingh@xxxxxxxxxx>
Cc: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Cc: Mike Rapoport (IBM) <rppt@xxxxxxxxxx>
Cc: Nicolas Geoffray <ngeoffray@xxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Ryan Roberts <ryan.roberts@xxxxxxx>
Cc: Suren Baghdasaryan <surenb@xxxxxxxxxx>
Cc: Tim Murray <timmurray@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 5 +++++
1 file changed, 5 insertions(+)
--- a/include/linux/mm.h~mm-add-vma_assert_locked-for-config_per_vma_lock
+++ a/include/linux/mm.h
@@ -781,6 +781,11 @@ static inline struct vm_area_struct *loc
return NULL;
}
+static inline void vma_assert_locked(struct vm_area_struct *vma)
+{
+ mmap_assert_locked(vma->vm_mm);
+}
+
static inline void release_fault_lock(struct vm_fault *vmf)
{
mmap_read_unlock(vmf->vma->vm_mm);
_
Patches currently in -mm which might be from lokeshgidra@xxxxxxxxxx are
userfaultfd-fix-return-error-if-mmap_changing-is-non-zero-in-move-ioctl.patch
userfaultfd-move-userfaultfd_ctx-struct-to-header-file.patch
userfaultfd-protect-mmap_changing-with-rw_sem-in-userfaulfd_ctx.patch
mm-add-vma_assert_locked-for-config_per_vma_lock.patch
userfaultfd-use-per-vma-locks-in-userfaultfd-operations.patch
