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| author |   Masahiro Yamada <masahiroy@kernel.org> | 2020-02-28 12:46:40 +0900 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-03-03 20:49:21 +0900 |
| commit | 2a86f6612164a10a3cdb6a499bddf329c4d69f84 (patch) | |
| tree | 159756c78f85219f2d16c21ec87feb5c4d8ff100 /init | |
| parent | Documentation/llvm: add documentation on building w/ Clang/LLVM (diff) | |
| download | linux-dev-2a86f6612164a10a3cdb6a499bddf329c4d69f84.tar.xz linux-dev-2a86f6612164a10a3cdb6a499bddf329c4d69f84.zip | |
kbuild: use KBUILD_DEFCONFIG as the fallback for DEFCONFIG_LIST
Most of the Kconfig commands (except defconfig and all*config) read
the .config file as a base set of CONFIG options.
When it does not exist, the files in DEFCONFIG_LIST are searched in
this order and loaded if found.
I do not see much sense in the last two lines in DEFCONFIG_LIST.
[1] ARCH_DEFCONFIG
The entry for DEFCONFIG_LIST is guarded by 'depends on !UML'. So, the
ARCH_DEFCONFIG definition in arch/x86/um/Kconfig is meaningless.
arch/{sh,sparc,x86}/Kconfig define ARCH_DEFCONFIG depending on 32 or
64 bit variant symbols. This is a little bit strange; ARCH_DEFCONFIG
should be a fixed string because the base config file is loaded before
the symbol evaluation stage.
Using KBUILD_DEFCONFIG makes more sense because it is fixed before
Kconfig is invoked. Fortunately, arch/{sh,sparc,x86}/Makefile define it
in the same way, and it works as expected. Hence, replace ARCH_DEFCONFIG
with "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)".
[2] arch/$(ARCH)/defconfig
This file path is no longer valid. The defconfig files are always located
in the arch configs/ directories.
$ find arch -name defconfig | sort
arch/alpha/configs/defconfig
arch/arm64/configs/defconfig
arch/csky/configs/defconfig
arch/nds32/configs/defconfig
arch/riscv/configs/defconfig
arch/s390/configs/defconfig
arch/unicore32/configs/defconfig
The path arch/*/configs/defconfig is already covered by
"arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)". So, this file path is
not necessary.
I moved the default KBUILD_DEFCONFIG to the top Makefile. Otherwise,
the 7 architectures listed above would end up with endless loop of
syncconfig.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/init/Kconfig b/init/Kconfig index 20a6ac33761c..240c1ed15c69 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -6,8 +6,7 @@ config DEFCONFIG_LIST default "/lib/modules/$(shell,uname -r)/.config" default "/etc/kernel-config" default "/boot/config-$(shell,uname -r)" - default ARCH_DEFCONFIG - default "arch/$(ARCH)/defconfig" + default "arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)" config CC_IS_GCC def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc) |