Symbol: __down_read
kernel/locking/rwsem.c
1539
LOCK_CONTENDED(sem, __down_read_trylock, __down_read);
kernel/locking/rwsem.c
1663
LOCK_CONTENDED(sem, __down_read_trylock, __down_read);
kernel/locking/rwsem.c
1692
__down_read(sem);