NUM_MM_FLAG_BITS
bitmap_zero(ACCESS_PRIVATE(&mm->flags, __mm_flags), NUM_MM_FLAG_BITS);
DECLARE_BITMAP(__mm_flags, NUM_MM_FLAG_BITS);
mm->binfmt, NUM_MM_FLAG_BITS, __mm_flags_get_bitmap(mm),
__private DECLARE_BITMAP(__mm_flags, NUM_MM_FLAG_BITS);