kbuild: teach kselftest-merge to find nested config files

Current implementation of kselftest-merge only finds config files that
are one level deep using `$(srctree)/tools/testing/selftests/*/config`.

Often, config files are added in nested directories, and do not get
picked up by kselftest-merge.

Use `find` to catch all config files under
`$(srctree)/tools/testing/selftests` instead.

Signed-off-by: Dan Rue <dan.rue@linaro.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index 004d67a4405f..d27e1326cc03 100644
--- a/Makefile
+++ b/Makefile
@@ -1228,9 +1228,8 @@ kselftest-clean:
 PHONY += kselftest-merge
 kselftest-merge:
         $(if $(wildcard $(objtree)/.config),, $(error No .config exists, config your kernel first!))
-        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
-                -m $(objtree)/.config \
-                $(srctree)/tools/testing/selftests/*/config
+        $(Q)find $(srctree)/tools/testing/selftests -name config | \
+                xargs $(srctree)/scripts/kconfig/merge_config.sh -m $(objtree)/.config
         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 
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