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2024-05-10kbuild: use $(src) instead of $(srctree)/$(src) for source directoryMasahiro Yamada
Kbuild conventionally uses $(obj)/ for generated files, and $(src)/ for checked-in source files. It is merely a convention without any functional difference. In fact, $(obj) and $(src) are exactly the same, as defined in scripts/Makefile.build: src := $(obj) When the kernel is built in a separate output directory, $(src) does not accurately reflect the source directory location. While Kbuild resolves this discrepancy by specifying VPATH=$(srctree) to search for source files, it does not cover all cases. For example, when adding a header search path for local headers, -I$(srctree)/$(src) is typically passed to the compiler. This introduces inconsistency between upstream and downstream Makefiles because $(src) is used instead of $(srctree)/$(src) for the latter. To address this inconsistency, this commit changes the semantics of $(src) so that it always points to the directory in the source tree. Going forward, the variables used in Makefiles will have the following meanings: $(obj) - directory in the object tree $(src) - directory in the source tree (changed by this commit) $(objtree) - the top of the kernel object tree $(srctree) - the top of the kernel source tree Consequently, $(srctree)/$(src) in upstream Makefiles need to be replaced with $(src). Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
2022-05-13csky: Remove unused $(dtb-y) from boot/MakefileMasahiro Yamada
arch/csky/boot/Makefile does not build DTB, arch/csky/boot/dts/Makefile does. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Guo Ren <guoren@kernel.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-18csky: remove deprecated arch/csky/boot/dts/include/dt-bindingsMasahiro Yamada
Having a symbolic link arch/*/boot/dts/include/dt-bindings was deprecated by commit d5d332d3f7e8 ("devicetree: Move include prefixes from arch to separate directory"). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2018-11-01csky: use common dtb build rulesGuo Ren
Remove the Kbuild rules in arch/csky and use common dtb build rules. This modification is based on: commit 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules") Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Rob Herring <robh@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de>
2018-11-01csky: remove builtin-dtb KbuildGuo Ren
Remove the builtin-dtb implementation in arch/csky. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Arnd Bergmann <arnd@arndb.de>
2018-10-25csky: Build infrastructureGuo Ren
This patch adds Makefile, Kconfig for build infrastructure. Signed-off-by: Guo Ren <ren_guo@c-sky.com> Acked-by: Arnd Bergmann <arnd@arndb.de>