[PATCH 2/3] Makefile: kselftest: use KCONFIG_CONFIG

[Arseny Maslennikov]

If the config file is reassigned through the KCONFIG_CONFIG
makeflag/envvar, this rule still attempts to use the wrong, possibly
nonexistent file.
Let's fix that.

Signed-off-by: Arseny Maslennikov <ar@xxxxxxxxx>
---
 Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index d5713e7b1e50..4d8760166a47 100644
--- a/Makefile
+++ b/Makefile
@@ -1199,9 +1199,9 @@ kselftest-clean:
 
 PHONY += kselftest-merge
 kselftest-merge:
-	$(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
+	$(if $(wildcard $(objtree)/$(KCONFIG_CONFIG)),, $(error No $(KCONFIG_CONFIG) exists, config your kernel first!))
 	$(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
-		-m $(objtree)/.config \
+		-m $(objtree)/$(KCONFIG_CONFIG) \
 		$(srctree)/tools/testing/selftests/*/config
 	+$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 
-- 
2.20.1