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[ Upstream commita314f52a02] Most 'make *config' commands use .config as the base configuration file. When .config does not exist, Kconfig tries to load a file listed in KCONFIG_DEFCONFIG_LIST instead. However, since commitb75b0a819a("kconfig: change defconfig_list option to environment variable"), warning messages have displayed an incorrect file name in such cases. Below is a demonstration using Debian Trixie. While loading /boot/config-6.12.9-amd64, the warning messages incorrectly show .config as the file name. With this commit, the correct file name is displayed in warnings. [Before] $ rm -f .config $ make config # # using defaults found in /boot/config-6.12.9-amd64 # .config:6804:warning: symbol value 'm' invalid for FB_BACKLIGHT .config:9895:warning: symbol value 'm' invalid for ANDROID_BINDER_IPC [After] $ rm -f .config $ make config # # using defaults found in /boot/config-6.12.9-amd64 # /boot/config-6.12.9-amd64:6804:warning: symbol value 'm' invalid for FB_BACKLIGHT /boot/config-6.12.9-amd64:9895:warning: symbol value 'm' invalid for ANDROID_BINDER_IPC Fixes:b75b0a819a("kconfig: change defconfig_list option to environment variable") Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>