Merge PR ceph#61018 into main

* refs/pull/61018/head:
	msg/async/Event: make the pipe byte static

Reviewed-by: Patrick Donnelly <[email protected]>
Reviewed-by: Samuel Just <[email protected]>

Author: batrick

src/msg/async/Event.cc

@@ -347,7 +347,7 @@ void EventCenter::wakeup()
     return ;
 
   ldout(cct, 20) << __func__ << dendl;
-  char buf = 'c';
+  static constexpr char buf = 'c';
   // wake up "event_wait"
   #ifdef _WIN32
   int n = send(notify_send_fd, &buf, sizeof(buf), 0);