REGRESSION: kernel: configure the kernel only when an input changed

[John Crispin]

On 02.10.26 21:00, Russell Senior wrote:
> https://github.com/openwrt/openwrt/commit/e97e3f36bd5d48add83c5c7fba907600b12a653c
> 
> This commit results in a regression on realtek switches (and perhaps
> elsewhere), where a stale initramfs kernel gets included in a
> subsequent squashfs image. See explanation here:
> https://pastebin.com/xhHsTQng. Reverting this commit was tested and
> fixes the problem.
> 
> To reproduce, with a .config stub of:
> 
>   CONFIG_TARGET_realtek=y
>   CONFIG_TARGET_realtek_rtl931x=y
>   CONFIG_TARGET_realtek_rtl931x_DEVICE_zyxel_xs1930-12hp=y
> 
> time make BUILD_LOG=1 IGNORE_ERRORS=m V=s target/linux/clean
> time make BUILD_LOG=1 IGNORE_ERRORS=m V=s
> $ ls -al bin/targets/realtek/rtl931x/*.bin
> <touch a file in the files overlay>
> time make -j1 BUILD_LOG=1 IGNORE_ERRORS=m V=s
> $ ls -al bin/targets/realtek/rtl931x/*.bin
> 
> The squashfs-sysupgrade.bin file size will jump by a few megabytes in
> the second build and, more significantly, boots as an initramfs
> instead of a squashfs due to the kernel-embdedded cpio rootfs.
> 


thanks for reporting the regression should be fixed by 5d5ade6d162d219828900e8fa4faa274a19808f4

	John