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authorMasahiro Yamada <masahiroy@kernel.org>2020-02-28 12:46:40 +0900
committerMasahiro Yamada <masahiroy@kernel.org>2020-03-03 20:49:21 +0900
commit2a86f6612164a10a3cdb6a499bddf329c4d69f84 (patch)
tree159756c78f85219f2d16c21ec87feb5c4d8ff100
parentfcf1b6a35c16ac500fa908a4022238e5d666eabf (diff)
downloadlinux-2a86f6612164a10a3cdb6a499bddf329c4d69f84.tar.bz2
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 [2] arch/$(ARCH)/defconfig This file path is no longer valid.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>
-rw-r--r--Makefile3
-rw-r--r--arch/sh/Kconfig5
-rw-r--r--arch/sparc/Kconfig5
-rw-r--r--arch/x86/Kconfig5
-rw-r--r--arch/x86/um/Kconfig5
-rw-r--r--init/Kconfig3
-rw-r--r--scripts/kconfig/Makefile4
7 files changed, 4 insertions, 26 deletions
diff --git a/Makefile b/Makefile
index 22bc7cc4b157..5435d11d8276 100644
--- a/Makefile
+++ b/Makefile
@@ -388,6 +388,9 @@ endif
KCONFIG_CONFIG ?= .config
export KCONFIG_CONFIG
+# Default file for 'make defconfig'. This may be overridden by arch-Makefile.
+export KBUILD_DEFCONFIG := defconfig
+
# SHELL used by kbuild
CONFIG_SHELL := sh
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 9ece111b0254..b4f0e37b83eb 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -87,11 +87,6 @@ config SUPERH64
select HAVE_EXIT_THREAD
select KALLSYMS
-config ARCH_DEFCONFIG
- string
- default "arch/sh/configs/shx3_defconfig" if SUPERH32
- default "arch/sh/configs/cayman_defconfig" if SUPERH64
-
config GENERIC_BUG
def_bool y
depends on BUG && SUPERH32
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index c1dd6dd642f4..0de15380d1fc 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -95,11 +95,6 @@ config SPARC64
select PCI_DOMAINS if PCI
select ARCH_HAS_GIGANTIC_PAGE
-config ARCH_DEFCONFIG
- string
- default "arch/sparc/configs/sparc32_defconfig" if SPARC32
- default "arch/sparc/configs/sparc64_defconfig" if SPARC64
-
config ARCH_PROC_KCORE_TEXT
def_bool y
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index beea77046f9b..98935f4387f9 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -240,11 +240,6 @@ config OUTPUT_FORMAT
default "elf32-i386" if X86_32
default "elf64-x86-64" if X86_64
-config ARCH_DEFCONFIG
- string
- default "arch/x86/configs/i386_defconfig" if X86_32
- default "arch/x86/configs/x86_64_defconfig" if X86_64
-
config LOCKDEP_SUPPORT
def_bool y
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig
index a8985e1f7432..95d26a69088b 100644
--- a/arch/x86/um/Kconfig
+++ b/arch/x86/um/Kconfig
@@ -27,11 +27,6 @@ config X86_64
def_bool 64BIT
select MODULES_USE_ELF_RELA
-config ARCH_DEFCONFIG
- string
- default "arch/um/configs/i386_defconfig" if X86_32
- default "arch/um/configs/x86_64_defconfig" if X86_64
-
config 3_LEVEL_PGTABLES
bool "Three-level pagetables" if !64BIT
default 64BIT
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)
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 5887ceb6229e..c9d0a4a8efb3 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -12,10 +12,6 @@ else
Kconfig := Kconfig
endif
-ifndef KBUILD_DEFCONFIG
-KBUILD_DEFCONFIG := defconfig
-endif
-
ifeq ($(quiet),silent_)
silent := -s
endif