write_seqcount_begin
write_seqcount_begin(&stats->lock);
write_seqcount_begin(&stats->lock);
write_seqcount_begin(>->stats.lock);
write_seqcount_begin((seqcount_t *)>->stats.lock);
write_seqcount_begin(>->stats.lock);
write_seqcount_begin((seqcount_t *)>->stats.lock);