linux-kernel - [PATCH] powerpc/boot: add DTB to 'targets'

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Message-Id: <20200713075629.5948-1-masahiroy@kernel.org>
Date:   Mon, 13 Jul 2020 16:56:28 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Christophe Leroy <christophe.leroy@....fr>,
        Michael Ellerman <mpe@...erman.id.au>,
        Michal Simek <michal.simek@...inx.com>,
        Paul Mackerras <paulus@...ba.org>,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH] powerpc/boot: add DTB to 'targets'

PowerPC always re-builds DTB even if nothing has been changed.

As for other architectures, arch/*/boot/dts/Makefile builds DTB by
using the dtb-y syntax.

In contrast, arch/powerpc/boot/dts/(fsl/)Makefile does nothing unless
CONFIG_OF_ALL_DTBS is defined. Instead, arch/powerpc/boot/Makefile
builds DTB on demand. You need to add DTB to 'targets' explicitly
so .*.cmd files are included.

Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

I want to apply this to kbuild tree because this is needed
to fix the build error caused by another kbuild patch:

https://lkml.org/lkml/2020/7/7/134


 arch/powerpc/boot/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 63d7456b9518..8792323707fd 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -366,6 +366,8 @@ initrd-y := $(patsubst zImage%, zImage.initrd%, \
 		$(patsubst treeImage%, treeImage.initrd%, $(image-y)))))
 initrd-y := $(filter-out $(image-y), $(initrd-y))
 targets	+= $(image-y) $(initrd-y)
+targets += $(foreach x, dtbImage uImage cuImage simpleImage treeImage, \
+		$(patsubst $(x).%, dts/%.dtb, $(filter $(x).%, $(image-y))))
 
 $(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz
 
-- 
2.25.1