Add some explicit comment for both Readline and cpu_set/cpu_get helpers
that they do not need the mon_lock protection.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 monitor.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/monitor.c b/monitor.c
index 176d3ecc04..38c50e06fc 100644
--- a/monitor.c
+++ b/monitor.c
@@ -207,6 +207,7 @@ struct Monitor {
     int suspend_cnt;            /* Needs to be accessed atomically */
     bool skip_flush;
     bool use_io_thr;
+    /* Only used in parser, so no lock needed. */
     ReadLineState *rs;
     MonitorQMP qmp;
     gchar *mon_cpu_path;
@@ -1316,7 +1317,7 @@ void qmp_qmp_capabilities(bool has_enable, QMPCapabilityList *enable,
     cur_mon->qmp.commands = &qmp_commands;
 }
 
-/* set the current CPU defined by the user */
+/* set the current CPU defined by the user.  BQL needed. */
 int monitor_set_cpu(int cpu_index)
 {
     CPUState *cpu;
@@ -1330,6 +1331,7 @@ int monitor_set_cpu(int cpu_index)
     return 0;
 }
 
+/* BQL neeeded. */
 static CPUState *mon_get_cpu_sync(bool synchronize)
 {
     CPUState *cpu;
-- 
2.14.3