On Fri, Nov 01, 2013 at 03:54:25PM +0800, Yuanhan Liu wrote: > --- a/mm/mmap.c > +++ b/mm/mmap.c > @@ -2955,15 +2955,15 @@ static void vm_lock_anon_vma(struct mm_struct *mm, > struct anon_vma *anon_vma) > * The LSB of head.next can't change from under us > * because we hold the mm_all_locks_mutex. > */ > - down_write_nest_lock(&anon_vma->rwsem, &mm->mmap_sem); > + write_lock(&anon_vma->rwlock);
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