[PATCH 1/2] kconfig: add merge_into_defconfig_named to set CONFIG_NAME

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Generated defconfigs that merge fragments into a base config inherit
CONFIG_NAME from the base, which is wrong for testing: pytest uses
CONFIG_NAME to locate the matching Labgrid environment YAML.

Add merge_into_defconfig_named, which appends the correct CONFIG_NAME
to .config before running olddefconfig, and switch all callers over.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 Makefile                 |  4 ++--
 arch/arm/Makefile        |  4 ++--
 arch/mips/Makefile       |  6 +++---
 arch/riscv/Makefile      |  4 ++--
 arch/sandbox/Makefile    | 10 +++++-----
 scripts/Makefile.defconf | 13 +++++++++++++
 6 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/Makefile b/Makefile
index 4296c97ef02d..7f31e79439fd 100644
--- a/Makefile
+++ b/Makefile
@@ -618,9 +618,9 @@ export KBUILD_DEFCONFIG CC_VERSION_TEXT
 endif
 
 %_efiloader_defconfig: FORCE
-	$(call merge_into_defconfig,$*_defconfig,efi-loader)
+	$(call merge_into_defconfig_named,$*_defconfig,efi-loader,$@)
 %_efi_defconfig: FORCE
-	$(call merge_into_defconfig,$*_defconfig,efi-loader efi-payload)
+	$(call merge_into_defconfig_named,$*_defconfig,efi-loader efi-payload,$@)
 
 config: outputmakefile scripts_basic FORCE
 	$(Q)$(MAKE) $(build)=scripts/kconfig KCONFIG_DEFCONFIG_LIST= $@
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index b38f694339a4..3455b2a79f75 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -4,9 +4,9 @@ KBUILD_DEFCONFIG := multi_v8_defconfig
 
 generated_configs += am335x_mlo_sdmmc_defconfig am335x_mlo_rawflash_defconfig
 am335x_mlo_sdmmc_defconfig:
-	$(call merge_into_defconfig,am335x_mlo_defconfig,nomtd)
+	$(call merge_into_defconfig_named,am335x_mlo_defconfig,nomtd,$@)
 am335x_mlo_rawflash_defconfig:
-	$(call merge_into_defconfig,am335x_mlo_defconfig,nomci)
+	$(call merge_into_defconfig_named,am335x_mlo_defconfig,nomci,$@)
 
 # Generic rule applying the fragment is in top-level Makefile
 generated_configs += $(patsubst %_defconfig,%_efiloader_defconfig, \
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 67d355e0ad81..8001bb54bed5 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -4,11 +4,11 @@ KBUILD_DEFCONFIG := qemu-malta_defconfig
 
 generated_configs += $(patsubst %, qemu-malta%_defconfig, el 64 64el)
 qemu-maltael_defconfig:
-	$(call merge_into_defconfig,qemu-malta_defconfig,le)
+	$(call merge_into_defconfig_named,qemu-malta_defconfig,le,$@)
 qemu-malta64_defconfig:
-	$(call merge_into_defconfig,qemu-malta_defconfig,mips64)
+	$(call merge_into_defconfig_named,qemu-malta_defconfig,mips64,$@)
 qemu-malta64el_defconfig:
-	$(call merge_into_defconfig,qemu-malta_defconfig,mips64 le)
+	$(call merge_into_defconfig_named,qemu-malta_defconfig,mips64 le,$@)
 
 #
 # Select the object file format to substitute into the linker script.
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index c7682d4bd003..d22a0368a33c 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -5,9 +5,9 @@ KBUILD_DEFCONFIG := rv64i_defconfig
 generated_configs += virt32_mmu_defconfig rv64i_mmu_defconfig
 
 virt32_mmu_defconfig:
-	$(call merge_into_defconfig,virt32_defconfig,enable_mmu)
+	$(call merge_into_defconfig_named,virt32_defconfig,enable_mmu,$@)
 rv64i_mmu_defconfig:
-	$(call merge_into_defconfig,rv64i_defconfig,enable_mmu)
+	$(call merge_into_defconfig_named,rv64i_defconfig,enable_mmu,$@)
 
 KBUILD_CPPFLAGS += -fno-strict-aliasing
 
diff --git a/arch/sandbox/Makefile b/arch/sandbox/Makefile
index 1b1774cc4b0a..27c3a591e2d9 100644
--- a/arch/sandbox/Makefile
+++ b/arch/sandbox/Makefile
@@ -5,15 +5,15 @@ KBUILD_DEFCONFIG := sandbox_defconfig
 generated_configs += headless_defconfig noshell_defconfig lockdown_defconfig \
 		     simpleconsole_defconfig libfuzzer_defconfig
 headless_defconfig:
-	$(call merge_into_defconfig,sandbox_defconfig,headless)
+	$(call merge_into_defconfig_named,sandbox_defconfig,headless,$@)
 noshell_defconfig:
-	$(call merge_into_defconfig,sandbox_defconfig,noshell)
+	$(call merge_into_defconfig_named,sandbox_defconfig,noshell,$@)
 lockdown_defconfig:
-	$(call merge_into_defconfig,sandbox_defconfig,headless noshell)
+	$(call merge_into_defconfig_named,sandbox_defconfig,headless noshell,$@)
 simpleconsole_defconfig:
-	$(call merge_into_defconfig,sandbox_defconfig,simpleconsole)
+	$(call merge_into_defconfig_named,sandbox_defconfig,simpleconsole,$@)
 libfuzzer_defconfig:
-	$(call merge_into_defconfig,sandbox_defconfig,libfuzzer)
+	$(call merge_into_defconfig_named,sandbox_defconfig,libfuzzer,$@)
 
 KBUILD_CPPFLAGS += -D__SANDBOX__ -fno-strict-aliasing -fvisibility=hidden
 
diff --git a/scripts/Makefile.defconf b/scripts/Makefile.defconf
index 93c848bb5a12..75a39cf333a5 100644
--- a/scripts/Makefile.defconf
+++ b/scripts/Makefile.defconf
@@ -35,3 +35,16 @@ define merge_into_defconfig_override
 		))
 	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 endef
+
+
+# Creates 'merged defconfigs' and sets CONFIG_NAME to the config name
+# ---------------------------------------------------------------------------
+# Usage:
+#   $(call merge_into_defconfig_named,base_config,config_fragment1 config_fragment2 ...,config_name)
+#
+# Input config fragments without '.config' suffix
+define merge_into_defconfig_named
+	$(call merge_into_defconfig_override,$1,$2)
+	$(Q)echo 'CONFIG_NAME="$3"' >> $(objtree)/.config
+	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
+endef
-- 
2.47.3