Files
linux/scripts
Jubin Zhong 83c382f436 FROMLIST: kbuild: Enable armthumb BCJ filter for Thumb-2 kernel
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@huawei.com>

Link: https://lore.kernel.org/lkml/1637323647-19988-1-git-send-email-zhongjubin@huawei.com/
Change-Id: I23c6e0fd2e54fdc84e78f122d6f4f06e54026696
Signed-off-by: Tao Huang <huangtao@rock-chips.com>
2022-02-22 15:04:18 +08:00
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