[PATCH] ipv6: default IPV6_SIT to m

From: Alyssa Ross

Date: Sun May 03 2026 - 13:00:29 EST


This basically defaulted to m until recently, since IPV6 defaulted to
m. Since IPV6 was changed to a boolean with a default of y, IPV6_SIT
started defaulting to built-in as well. This results in a surprise
sit0 device by default for defconfig (and defconfig-derived config)
users at boot. For me, this broke an (admittedly non-robust) script.
Preserve the behaviour of most configs by avoiding building this
module, that's probably overall seldom used compared to IPv6 as a
whole, into the kernel.

Fixes: 309b905deee59 ("ipv6: convert CONFIG_IPV6 to built-in only and clean up Kconfigs")
Signed-off-by: Alyssa Ross <hi@xxxxxxxxx>
---
net/ipv6/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig
index c024aa77f25ba..3cfccb6ce5c29 100644
--- a/net/ipv6/Kconfig
+++ b/net/ipv6/Kconfig
@@ -164,7 +164,7 @@ config IPV6_SIT
select INET_TUNNEL
select NET_IP_TUNNEL
select IPV6_NDISC_NODETYPE
- default y
+ default m
help
Tunneling means encapsulating data of one protocol type within
another protocol and sending it over a channel that understands the

base-commit: 254f49634ee16a731174d2ae34bc50bd5f45e731
--
2.53.0