6.18-stable review patch. If anyone has any objections, please let me know.
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From: Thomas De Schampheleire thomas.de_schampheleire@nokia.com
[ Upstream commit b08fc4d0ec2466558f6d5511434efdfabbddf2a6 ]
Since commit e7e2941300d2 ("kbuild: split device tree build rules into scripts/Makefile.dtbs"), it is no longer possible to compile a device tree blob that is not specified in a make rule like: dtb-$(CONFIG_FOO) += foo.dtb
Before the mentioned commit, one could copy a dts file to e.g. arch/arm64/boot/dts/ (or a new subdirectory) and then convert it to a dtb file using: make ARCH=arm64 foo.dtb
In this scenario, both 'dtb-y' and 'dtb-' are empty, and the inclusion of scripts/Makefile.dtbs relies on 'targets' to contain the MAKECMDGOALS. The value of 'targets', however, is only final later in the code.
Move the conditional include of scripts/Makefile.dtbs down to where the value of 'targets' is final. Since Makefile.dtbs updates 'always-y' which is used as a prerequisite in the build rule, the build rule also needs to move down.
Fixes: e7e2941300d2 ("kbuild: split device tree build rules into scripts/Makefile.dtbs") Signed-off-by: Thomas De Schampheleire thomas.de_schampheleire@nokia.com Reviewed-by: Nathan Chancellor nathan@kernel.org Tested-by: Nathan Chancellor nathan@kernel.org Acked-by: Rob Herring (Arm) robh@kernel.org Link: https://patch.msgid.link/20251126100017.1162330-1-thomas.de_schampheleire@no... Signed-off-by: Nicolas Schier nsc@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- scripts/Makefile.build | 26 ++++++++++++++------------ 1 file changed, 14 insertions(+), 12 deletions(-)
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 52c08c4eb0b9..5037f4715d74 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -527,18 +527,6 @@ ifneq ($(userprogs),) include $(srctree)/scripts/Makefile.userprogs endif
-ifneq ($(need-dtbslist)$(dtb-y)$(dtb-)$(filter %.dtb %.dtb.o %.dtbo.o,$(targets)),) -include $(srctree)/scripts/Makefile.dtbs -endif - -# Build -# --------------------------------------------------------------------------- - -$(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ - $(if $(KBUILD_MODULES), $(targets-for-modules)) \ - $(subdir-ym) $(always-y) - @: - # Single targets # ---------------------------------------------------------------------------
@@ -568,6 +556,20 @@ FORCE: targets += $(filter-out $(single-subdir-goals), $(MAKECMDGOALS)) targets := $(filter-out $(PHONY), $(targets))
+# Now that targets is fully known, include dtb rules if needed +ifneq ($(need-dtbslist)$(dtb-y)$(dtb-)$(filter %.dtb %.dtb.o %.dtbo.o,$(targets)),) +include $(srctree)/scripts/Makefile.dtbs +endif + +# Build +# Needs to be after the include of Makefile.dtbs, which updates always-y +# --------------------------------------------------------------------------- + +$(obj)/: $(if $(KBUILD_BUILTIN), $(targets-for-builtin)) \ + $(if $(KBUILD_MODULES), $(targets-for-modules)) \ + $(subdir-ym) $(always-y) + @: + # Read all saved command lines and dependencies for the $(targets) we # may be building above, using $(if_changed{,_dep}). As an # optimization, we don't need to read them if the target does not