From c8219af76709a3f7911df65302ddb2592db04e06 Mon Sep 17 00:00:00 2001
From: Michael Kerrisk <mtk.manpages@gmail.com>
Date: Sun, 8 Aug 2021 22:54:29 +0200
Subject: [PATCH] ioctl_tty.2: Note kernel version that added TCGETS2, TCSETS2,
 TCSETSW2, and TCSETSF2

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
---
 man2/ioctl_tty.2 | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/man2/ioctl_tty.2 b/man2/ioctl_tty.2
index 9854cfd3f..1d9a6dee1 100644
--- a/man2/ioctl_tty.2
+++ b/man2/ioctl_tty.2
@@ -71,7 +71,10 @@ Equivalent to
 Allow the output buffer to drain, discard pending input, and
 set the current serial port settings.
 .PP
-The following four ioctls are just like
+The following four ioctls, added in Linux 2.6.20,
+.\" commit 64bb6c5e1ddcd47c951740485026ef08975ee2e6
+.\" commit 592ee3a5e5e2a981ef2829a0380093006d045661
+are just like
 .BR TCGETS ,
 .BR TCSETS ,
 .BR TCSETSW ,