Commit 027232da authored by Kirill A. Shutemov's avatar Kirill A. Shutemov Committed by Linus Torvalds
Browse files

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@linux.intel.com

Signed-off-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 31c5bda3
...@@ -452,6 +452,12 @@ struct vm_operations_struct { ...@@ -452,6 +452,12 @@ struct vm_operations_struct {
unsigned long addr); 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 mmu_gather;
struct inode; struct inode;
......
...@@ -312,10 +312,8 @@ struct vm_area_struct *vm_area_alloc(struct mm_struct *mm) ...@@ -312,10 +312,8 @@ struct vm_area_struct *vm_area_alloc(struct mm_struct *mm)
{ {
struct vm_area_struct *vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL); struct vm_area_struct *vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
if (vma) { if (vma)
vma->vm_mm = mm; vma_init(vma, mm);
INIT_LIST_HEAD(&vma->anon_vma_chain);
}
return vma; return vma;
} }
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment