4  * Userspace RCU library with explicit memory barriers
30 #include "qemu/rcu.h"
124          * thread must exit its RCU read-side critical section before  in wait_for_readers()
148     /* Write RCU-protected pointers before reading p_rcu_reader->ctr.  in synchronize_rcu()
151      * Also orders write to RCU-protected pointers before  in synchronize_rcu()
318     struct rcu_head rcu;  member
329  * This function ensures that all pending RCU callbacks
332  * drops big qemu lock during the wait to allow RCU thread
351      * RCU callbacks are invoked in the same order as in which they  in drain_call_rcu()
353      * is called, all RCU callbacks that were registered on this thread  in drain_call_rcu()
356      * Note that since we have only one global queue of the RCU callbacks,  in drain_call_rcu()
357      * we also end up waiting for most of RCU callbacks that were registered  in drain_call_rcu()
363     call_rcu1(&rcu_drain.rcu, drain_rcu_callback);  in drain_call_rcu()