1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 98694364c96f..bed5a3d40307 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -201,6 +201,9 @@ struct tty_port {
         unsigned char           *xmit_buf;      /* Optional buffer */
         int                     close_delay;    /* Close port delay */
         int                     closing_wait;   /* Delay for output */
+        int                     drain_delay;    /* Set to zero if no pure time
+                                                   based drain is needed else
+                                                   set to size of fifo */
 };
 
 /*