F_CTL_FIRST_SEQ
#define F_CTL_FIRST_SEQ 0x200000 /* 1 if first sequence of XCHG */
#define F_CTL_FIRST_SEQ 0x200000 /* 1 if first sequence of XCHG */
#define F_CTL_FIRST_SEQ 0x200000 /* 1 if first sequence of XCHG */