From 7599ca4e958a2dd3839da4c959d4d0db0330c3f1 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Wed, 30 Jun 2021 14:44:23 +0900
Subject: [PATCH] Kconfig: mention that IOB_NCHAINS is not used by TCP anymore

---
 mm/iob/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/mm/iob/Kconfig b/mm/iob/Kconfig
index 9327ee1d3b..85dc43fb9b 100644
--- a/mm/iob/Kconfig
+++ b/mm/iob/Kconfig
@@ -47,6 +47,9 @@ config IOB_NCHAINS
 		I/O buffer chain containers that also carry a payload of usage
 		specific information.
 
+		Note: TCP doesn't use this.
+		Note: UDP and CAN use this.
+
 config IOB_THROTTLE
 	int "I/O buffer throttle value"
 	default 0 if !NET_WRITE_BUFFERS || !NET_READAHEAD