Ramips Targets Are Not Building After Kernel Version 6.1

[khanjui]

Describe the bug

See discussion: #14546 (comment)

OpenWrt version

r25519-7ea82bc17d

OpenWrt release

SNAPSHOT

OpenWrt target/subtarget

ramips/mt7621

Device

Xiaomi Mi Router 4A Gigabit Edition

Image kind

Official downloaded image

Steps to reproduce

Latest SNAPSHOT for mt7621 is from 2024-03-12 11:22:23

Actual behaviour

No response

Expected behaviour

Should build after getting fixed.

Additional info

No response

Diffconfig

No response

Terms

• I am reporting an issue for OpenWrt, not an unsupported fork.

[namiltd]

The problem has already been noticed on the forum: https://forum.openwrt.org/t/ramips-with-kernel-6-1/191893
Only mt7620 compiles correctly, the remaining ones, i.e. mt7621, mt76x8, rt288x, rt305x, rt3883 show compilation errors.

[predators46]

it's normal if the firmware size is too large

[namiltd]

Trying to find the cause, I locally compiled routers that show errors (e.g. tplink_tl-wpa8631p-v3 or tplink_re350-v1) and the local build had no errors.
The problem is that for 6.1 only initramfs-kernel is generated and squashfs-factory and squashfs-sysupgrade are missing due to the reason mentioned by predators46
The initramfs-kernel file is approximately 500KB larger. That's a lot.
We should temporarily exclude devices that show errors from compilation and try to optimize the kernel size.

[namiltd]

The issue should not be closed yet because only one subtarget mt7621 has been fixed. Mt76x8, rt288x, rt305x and rt3883 still not working.

[namiltd]

I just generated a PR #14959 to enable building with kernel 6.1.

[hauke]

Fixed in bce7b4f