__usdt_sema_name
__usdt_sema_implicit, __usdt_sema_name(group, name) \
__usdt_sema_implicit, __usdt_sema_name(group, name), \
extern struct usdt_sema __usdt_sema_name(group, name) \
__usdt_asm_name(__usdt_sema_name(group, name)); \
__usdt_sema_implicit(__usdt_sema_name(group, name)); \
__usdt_sema_name(group, name).active > 0; \