__acquire_shared
__acquire_shared(ret_expr); \
__acquire_shared(RCU);
__acquire_shared(RCU);
__acquire_shared(RCU_BH);
__acquire_shared(RCU);
__acquire_shared(RCU_SCHED);
__acquire_shared(RCU);
__acquire_shared(RCU_SCHED);
# define do_raw_read_lock(rwlock) do {__acquire_shared(lock); arch_read_lock(&(rwlock)->raw_lock); } while (0)
do { __acquire_shared(lock); (void)(lock); } while (0)
__acquire_shared(ssp);
__acquire_shared(ssp);
__acquire_shared(ssp);