Migration and yank code assume that qio_channel_shutdown is thread
-safe. Document this after checking the code.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 include/io/channel.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/io/channel.h b/include/io/channel.h
index d4557f0930..6b8a2b87b8 100644
--- a/include/io/channel.h
+++ b/include/io/channel.h
@@ -516,6 +516,8 @@ int qio_channel_close(QIOChannel *ioc,
  * QIO_CHANNEL_FEATURE_SHUTDOWN prior to calling
  * this method.
  *
+ * This function is thread-safe.
+ *
  * Returns: 0 on success, -1 on error
  */
 int qio_channel_shutdown(QIOChannel *ioc,
--
2.20.1