The patch titled
Subject: mm: introduce vma_init()
has been added to the -mm tree. Its filename is
mm-introduce-vma_init.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-introduce-vma_init.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-introduce-vma_init.patch
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The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: mm: introduce vma_init()
Not all VMAs allocated with vm_area_alloc(). Some of them allocated on
stack or in data segment.
The new helper can be use to initialize VMA properly regardless where it
was allocated.
Link: http://lkml.kernel.org/r/20180724121139.62570-2-kirill.shutemov@xxxxxxxxxxxxxxx
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Acked-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 6 ++++++
kernel/fork.c | 6 ++----
2 files changed, 8 insertions(+), 4 deletions(-)
diff -puN include/linux/mm.h~mm-introduce-vma_init include/linux/mm.h
--- a/include/linux/mm.h~mm-introduce-vma_init
+++ a/include/linux/mm.h
@@ -452,6 +452,12 @@ struct vm_operations_struct {
unsigned long addr);
};
+static inline void vma_init(struct vm_area_struct *vma, struct mm_struct *mm)
+{
+ vma->vm_mm = mm;
+ INIT_LIST_HEAD(&vma->anon_vma_chain);
+}
+
struct mmu_gather;
struct inode;
diff -puN kernel/fork.c~mm-introduce-vma_init kernel/fork.c
--- a/kernel/fork.c~mm-introduce-vma_init
+++ a/kernel/fork.c
@@ -312,10 +312,8 @@ struct vm_area_struct *vm_area_alloc(str
{
struct vm_area_struct *vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
- if (vma) {
- vma->vm_mm = mm;
- INIT_LIST_HEAD(&vma->anon_vma_chain);
- }
+ if (vma)
+ vma_init(vma, mm);
return vma;
}
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
mm-introduce-vma_init.patch
mm-use-vma_init-to-initialize-vmas-on-stack-and-data-segments.patch
mm-fix-vma_is_anonymous-false-positives.patch
mm-page_ext-drop-definition-of-unused-page_ext_debug_poison.patch
mm-page_ext-constify-lookup_page_ext-argument.patch
