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-rw-r--r--Makefile4
1 files changed, 4 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index d810d6cb4d08..1888fabe4032 100644
--- a/Makefile
+++ b/Makefile
@@ -446,7 +446,11 @@ $(KCONFIG_CONFIG) include/config/auto.conf.cmd: ;
# if auto.conf.cmd is missing then we are probarly in a cleaned tree so
# we execute the config step to be sure to catch updated Kconfig files
include/config/auto.conf: $(KCONFIG_CONFIG) include/config/auto.conf.cmd
+ifeq ($(KBUILD_EXTMOD),)
$(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig
+else
+ $(error kernel configuration not valid - run 'make prepare' in $(srctree) to update it)
+endif
else
# Dummy target needed, because used as prerequisite