RSEQ_ACCESS_ONCE
#define RSEQ_WRITE_ONCE(x, v) __extension__ ({ RSEQ_ACCESS_ONCE(x) = (v); })
#define RSEQ_READ_ONCE(x) RSEQ_ACCESS_ONCE(x)
return RSEQ_ACCESS_ONCE(rseq_get_abi()->cpu_id);
return RSEQ_ACCESS_ONCE(rseq_get_abi()->cpu_id_start);
return RSEQ_ACCESS_ONCE(rseq_get_abi()->node_id);
return RSEQ_ACCESS_ONCE(rseq_get_abi()->mm_cid);