From c9395ad54e2cabb87d408becc37566f3d8248933 Mon Sep 17 00:00:00 2001
From: Christian Lamparter <chunkeey@gmail.com>
Date: Sun, 1 Dec 2019 02:08:23 +0100
Subject: [PATCH] powerpc: bootwrapper: force gzip as mkimage's compression
 method

Due to CONFIG_KERNEL_XZ symbol, the bootwrapper code tries to
instruct the mkimage to use the xz compression, which isn't
supported. This patch forces the gzip compression, which is
supported and doesn't matter because the generated uImage for
the apm821xx target gets ignored as the OpenWrt toolchain will
do separate U-Boot kernel images for each device individually.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
---
 arch/powerpc/boot/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -276,7 +276,7 @@ compressor-$(CONFIG_KERNEL_LZO) := lzo
 
 # args (to if_changed): 1 = (this rule), 2 = platform, 3 = dts 4=dtb 5=initrd
 quiet_cmd_wrap	= WRAP    $@
-      cmd_wrap	=$(CONFIG_SHELL) $(wrapper) -Z $(compressor-y) -c -o $@ -p $2 \
+      cmd_wrap	=$(CONFIG_SHELL) $(wrapper) -Z gzip -c -o $@ -p $2 \
 		$(CROSSWRAP) $(if $3, -s $3)$(if $4, -d $4)$(if $5, -i $5) \
 		vmlinux
 
