Add C comment that IsBackendPid() is called by external modules, so we

bmomjian · bmomjian · commit dbdb2172a094 · 2012-10-01T10:14:35.000-04:00
don't accidentally remove it.
diff --git a/src/backend/storage/ipc/procarray.c b/src/backend/storage/ipc/procarray.c
@@ -1929,6 +1929,8 @@ BackendXidGetPid(TransactionId xid)
 
 /*
  * IsBackendPid -- is a given pid a running backend
+ *
+ * This is not called by the backend, but is called by external modules.
  */
 bool
 IsBackendPid(int pid)
