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-rw-r--r--Documentation/networking/dccp.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/networking/dccp.rst b/Documentation/networking/dccp.rst
index dde16be04456..91e5c33ba3ff 100644
--- a/Documentation/networking/dccp.rst
+++ b/Documentation/networking/dccp.rst
@@ -192,6 +192,9 @@ FIONREAD
Works as in udp(7): returns in the ``int`` argument pointer the size of
the next pending datagram in bytes, or 0 when no datagram is pending.
+SIOCOUTQ
+ Returns the number of unsent data bytes in the socket send queue as ``int``
+ into the buffer specified by the argument pointer.
Other tunables
==============