Re: [PATCH v2] kbuild: Enable armthumb BCJ filter for Thumb-2 kernel

[Lasse Collin]

On 2021-11-20 Jubin Zhong wrote:
> xz_wrap.sh use $SRCARCH to detect the BCJ filter. However, assigning
> arm BCJ filter to Thumb-2 kernel is not optimal. In my case, about 5%
> decrease of image size is observed with armthumb BCJ filter:
> 
> Test results:
>   hardware:      QEMU emulator version 3.1.0
>   config:        vexpress_defconfig with THUMB2_KERNEL & KERNEL_XZ on
>   arm BCJ:       4029808
>   armthumb BCJ:  3827280
> 
> Choose armthumb BCJ filter for Thumb-2 kernel to make smaller images.
> 
> Signed-off-by: Jubin Zhong <zhongjubin@xxxxxxxxxx>

I still didn't test it but it looks good to me.

Acked-by: Lasse Collin <lasse.collin@xxxxxxxxxxx>

-- 
Lasse Collin