jtag_master_lock
if ((jtm = jtag_master_lock()) == NULL)
jtm = jtag_master_lock();
if ((jtm = jtag_master_lock()) == NULL)
if ((jtm = jtag_master_lock()) == NULL)
jtm = jtag_master_lock();
struct jt_mstr *jtag_master_lock(void);