mm: make vm_area_alloc() initialize core fields
Like vm_area_dup(), it initializes the anon_vma_chain head, and the
basic mm pointer.
The rest of the fields end up being different for different users,
although the plan is to also initialize the 'vm_ops' field to a dummy
entry.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/nommu.c b/mm/nommu.c
index c2560e9..1d22fdb 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1204,7 +1204,7 @@ unsigned long do_mmap(struct file *file,
if (!region)
goto error_getting_region;
- vma = vm_area_alloc();
+ vma = vm_area_alloc(current->mm);
if (!vma)
goto error_getting_vma;
@@ -1212,7 +1212,6 @@ unsigned long do_mmap(struct file *file,
region->vm_flags = vm_flags;
region->vm_pgoff = pgoff;
- INIT_LIST_HEAD(&vma->anon_vma_chain);
vma->vm_flags = vm_flags;
vma->vm_pgoff = pgoff;