Quentin Schulz <foss+uboot@0leil.net> says:
This migrates the net options away from the main Kconfig to net/Kconfig,
rename the current NET option to NET_LEGACY to really highlight what it
is and hopefully encourage more people to use lwIP, add a new NET
menuconfig (but keep NO_NET as an alias to NET=n for now) which then
allows us to replace all the "if legacy_stack || lwip_stack" checks with
"if net_support" which is easier to read and maintain.
The only doubt I have is wrt SYS_RX_ETH_BUFFER which seems to be needed
for now even when no network is configured? Likely due to
include/net-common.h with PKTBUFSRX?
No change in behavior is intended. Only change in defconfig including
other defconfigs where NO_NET=y or NET is not set, in which case NO_NET
is not set or NET=y should be set in the top defconfig. Similar change
required for config fragments. See commit log in patch adding NET
menuconfig for details.
This was tested based on 70fd0c3bb7c2 ("x86: there is no
CONFIG_UBOOT_ROMSIZE_KB_12288"), from within the GitLab CI container
trini/u-boot-gitlab-ci-runner:noble-20251013-23Jan2026 and set up
similarly as in "build all platforms in a single job" GitLab CI job.
#!/usr/bin/env bash
set -o pipefail
set -eux
ARGS="-BvelPEWM --reproducible-builds --step 0"
./tools/buildman/buildman -o ${O} --force-build $ARGS -CE $*
./tools/buildman/buildman -o ${O} $ARGS -Ssd $*
O=../build/u-boot/ ../u-boot.sh -b master^..b4/net-kconfig |& tee ../log.txt
I can't really decipher the log.txt, but there's no line starting with
+ which would be an error according to tools/buildman/builder.py help
text. Additionally, because I started the script with set -e set and
because buildman has an exit code != 0 when it fails to build a board,
and I have the summary printed (which is the second buildman call), I
believe it means all builds passed.
The summary is the following:
aarch64: (for 537/537 boards) all +0.0 rodata +0.0
uniphier_v8 : all +1 rodata +1
u-boot: add: 0/0, grow: 1/0 bytes: 1/0 (1)
function old new delta
data_gz 10640 10641 +1
arm: (for 733/733 boards) all -0.0 rodata -0.0
uniphier_v7 : all -1 rodata -1
u-boot: add: 0/0, grow: 0/-1 bytes: 0/-1 (-1)
function old new delta
data_gz 11919 11918 -1
opos6uldev : all -3 rodata -3
u-boot: add: 0/0, grow: 0/-1 bytes: 0/-3 (-3)
function old new delta
data_gz 18778 18775 -3
uniphier_ld4_sld8: all -3 rodata -3
u-boot: add: 0/0, grow: 0/-1 bytes: 0/-3 (-3)
function old new delta
data_gz 11276 11273 -3
stemmy : all -20 rodata -20
u-boot: add: 0/0, grow: 0/-1 bytes: 0/-20 (-20)
function old new delta
data_gz 15783 15763 -20
As far as I could tell this data_gz is an automatically generated array
when CONFIG_CMD_CONFIG is enabled. It is the compressed .config stored
in binary form. Because I'm changing the name of symbols, replacing a
menu with a menuconfig, additional text makes it to .config and the
"# Networking" section in .config disappears.
Here is the diff for the 5 defconfigs listed above, generated with:
for f in build/*-m; do
diff --unified=0 $f/.config $(dirname $f)/$(basename -a -s '-m' $f)/.config
done
(-m is the build directory for master, and without the suffix, it's the
top commit of this series)
"""
--- build/opos6uldev-m/.config 2026-04-20 10:53:49.804528526 +0200
+++ build/opos6uldev/.config 2026-04-20 11:03:37.430242767 +0200
@@ -970,4 +969,0 @@
-
-#
-# Networking
-#
@@ -975,0 +972 @@
+CONFIG_NET_LEGACY=y
--- build/stemmy-m/.config 2026-04-20 11:01:33.653698123 +0200
+++ build/stemmy/.config 2026-04-20 11:04:53.452577311 +0200
@@ -733,4 +732,0 @@
-
-#
-# Networking
-#
@@ -738,2 +733,0 @@
-# CONFIG_NET is not set
-# CONFIG_NET_LWIP is not set
--- build/uniphier_ld4_sld8-m/.config 2026-04-20 11:00:41.605469071 +0200
+++ build/uniphier_ld4_sld8/.config 2026-04-20 11:04:22.226439899 +0200
@@ -997,4 +996,0 @@
-
-#
-# Networking
-#
@@ -1002,0 +999 @@
+CONFIG_NET_LEGACY=y
--- build/uniphier_v7-m/.config 2026-04-20 10:53:04.019307319 +0200
+++ build/uniphier_v7/.config 2026-04-20 11:03:01.688085486 +0200
@@ -1004,4 +1003,0 @@
-
-#
-# Networking
-#
@@ -1009,0 +1006 @@
+CONFIG_NET_LEGACY=y
--- build/uniphier_v8-m/.config 2026-04-20 10:43:05.614441175 +0200
+++ build/uniphier_v8/.config 2026-04-20 10:41:03.214852130 +0200
@@ -875,4 +874,0 @@
-
-#
-# Networking
-#
@@ -880,0 +877 @@
+CONFIG_NET_LEGACY=y
"""
This is fine:
- Networking menu doesn't exist anymore so "#\n# Networking\n#\n" won't
be in .config anymore.
- opos6uldev, uniphier_ld4_sld8, uniphier_v7 and uniphier_v8 all have
(old) CONFIG_NET enabled, (new) CONFIG_NET will still be set but
CONFIG_NET_LEGACY also needs to be defined now to reflect the stack
choice (even if default),
- stemmy has CONFIG_NO_NET set, which means CONFIG_NET and
CONFIG_NET_LWIP are not reachable anymore hence why they don't need to
be part of .config,
GitLab CI was run on this series (well, not exactly, but it's only
changes to the git logs that were made):
https://source.denx.de/u-boot/contributors/qschulz/u-boot/-/pipelines/29849
It passes.
Link: https://lore.kernel.org/r/20260420-net-kconfig-v1-0-9900002d8e72@cherry.de