DEFINE_SEQLOCK     42 fs/dcache.c    __cacheline_aligned_in_smp DEFINE_SEQLOCK(rename_lock);
DEFINE_SEQLOCK     27 kernel/time/timekeeping.c __cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock);
DEFINE_SEQLOCK     33 net/phonet/sysctl.c static DEFINE_SEQLOCK(local_port_range_lock);