is_mergeable_anon_vma 701 mm/mmap.c is_mergeable_anon_vma(anon_vma, vma->anon_vma)) { is_mergeable_anon_vma 720 mm/mmap.c is_mergeable_anon_vma(anon_vma, vma->anon_vma)) { is_mergeable_anon_vma 796 mm/mmap.c is_mergeable_anon_vma(prev->anon_vma,