exec: move rcu_read_lock/unlock to address_space_translate callers
Once address_space_translate will be called outside the BQL, the returned
MemoryRegion might disappear as soon as the RCU read-side critical section
ends. Avoid this by moving the critical section to the callers.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1426684909-95030-3-git-send-email-pbonzini@redhat.com>
diff --git a/include/exec/memory.h b/include/exec/memory.h
index 0ccfd3b..b61c84f 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -1233,7 +1233,9 @@
#endif
/* address_space_translate: translate an address range into an address space
- * into a MemoryRegion and an address range into that section
+ * into a MemoryRegion and an address range into that section. Should be
+ * called from an RCU critical section, to avoid that the last reference
+ * to the returned region disappears after address_space_translate returns.
*
* @as: #AddressSpace to be accessed
* @addr: address within that address space
