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-rw-r--r--include/linux/tty_driver.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index e48c608a8fa8..92e337c18839 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -152,6 +152,8 @@
* This routine notifies the tty driver that it should stop
* outputting characters to the tty device.
*
+ * Called with ->flow_lock held. Serialized with start() method.
+ *
* Optional:
*
* Note: Call stop_tty not this method.
@@ -161,6 +163,8 @@
* This routine notifies the tty driver that it resume sending
* characters to the tty device.
*
+ * Called with ->flow_lock held. Serialized with stop() method.
+ *
* Optional:
*
* Note: Call start_tty not this method.