diff options
| author | Fernando Fernandez Mancera <fmancera@suse.de> | 2026-03-25 13:08:42 +0100 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-03-29 11:21:22 -0700 |
| commit | 309b905deee595619cc38719f48d63d57b8bff3d (patch) | |
| tree | 877158428ba63e826349eff2a21faa18682b2dc8 /net/ipv6 | |
| parent | ced629dc8e5c51ff2b5d847adeeb1035cd655d58 (diff) | |
| download | lwn-309b905deee595619cc38719f48d63d57b8bff3d.tar.gz lwn-309b905deee595619cc38719f48d63d57b8bff3d.zip | |
ipv6: convert CONFIG_IPV6 to built-in only and clean up Kconfigs
Maintaining a modular IPv6 stack offers image size savings for specific
setups, this benefit is outweighed by the architectural burden it
imposes on the subsystems on implementation and maintenance. Therefore,
drop it.
Change CONFIG_IPV6 from tristate to bool. Remove all Kconfig
dependencies across the tree that explicitly checked for IPV6=m. In
addition, remove MODULE_DESCRIPTION(), MODULE_ALIAS(), MODULE_AUTHOR()
and MODULE_LICENSE().
This is also replacing module_init() by device_initcall(). It is not
possible to use fs_initcall() as IPv4 does because that creates a race
condition on IPv6 addrconf.
Finally, modify the default configs from CONFIG_IPV6=m to CONFIG_IPV6=y
except for m68k as according to the bloat-o-meter the image is
increasing by 330KB~ and that isn't acceptable. Instead, disable IPv6 on
this architecture by default. This is aligned with m68k RAM requirements
and recommendations [1].
[1] http://www.linux-m68k.org/faq/ram.html
Signed-off-by: Fernando Fernandez Mancera <fmancera@suse.de>
Tested-by: Ricardo B. Marlière <rbm@suse.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org> # arm64
Link: https://patch.msgid.link/20260325120928.15848-2-fmancera@suse.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/Kconfig | 6 | ||||
| -rw-r--r-- | net/ipv6/af_inet6.c | 8 |
2 files changed, 2 insertions, 12 deletions
diff --git a/net/ipv6/Kconfig b/net/ipv6/Kconfig index b8f9a8c0302e..c024aa77f25b 100644 --- a/net/ipv6/Kconfig +++ b/net/ipv6/Kconfig @@ -3,9 +3,8 @@ # IPv6 configuration # -# IPv6 as module will cause a CRASH if you try to unload it menuconfig IPV6 - tristate "The IPv6 protocol" + bool "The IPv6 protocol" default y select CRYPTO_LIB_SHA1 help @@ -17,9 +16,6 @@ menuconfig IPV6 Documentation/networking/ipv6.rst and read the HOWTO at <https://www.tldp.org/HOWTO/Linux+IPv6-HOWTO/> - To compile this protocol support as a module, choose M here: the - module will be called ipv6. - if IPV6 config IPV6_ROUTER_PREF diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c index eb9fff86baa1..bb29b29fdcfb 100644 --- a/net/ipv6/af_inet6.c +++ b/net/ipv6/af_inet6.c @@ -70,10 +70,6 @@ #include "ip6_offload.h" -MODULE_AUTHOR("Cast of dozens"); -MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); -MODULE_LICENSE("GPL"); - /* The inetsw6 table contains everything that inet6_create needs to * build a new socket. */ @@ -1278,6 +1274,4 @@ out_unregister_tcp_proto: proto_unregister(&tcpv6_prot); goto out; } -module_init(inet6_init); - -MODULE_ALIAS_NETPROTO(PF_INET6); +device_initcall(inet6_init); |