Remove some variables.

Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---

 scripts/Makefile.clean | 13 ++-----------
 1 file changed, 2 insertions(+), 11 deletions(-)

diff --git a/scripts/Makefile.clean b/scripts/Makefile.clean
index fc38a34128d4..e367eb95c5c0 100644
--- a/scripts/Makefile.clean
+++ b/scripts/Makefile.clean
@@ -17,17 +17,8 @@ include $(if $(wildcard $(kbuild-dir)/Kbuild), 
$(kbuild-dir)/Kbuild, $(kbuild-di
 # Figure out what we need to build from the various variables
 # ==========================================================================
 
-__subdir-y     := $(patsubst %/,%,$(filter %/, $(obj-y)))
-subdir-y       += $(__subdir-y)
-__subdir-m     := $(patsubst %/,%,$(filter %/, $(obj-m)))
-subdir-m       += $(__subdir-m)
-__subdir-      := $(patsubst %/,%,$(filter %/, $(obj-)))
-subdir-                += $(__subdir-)
-
-# Subdirectories we need to descend into
-
-subdir-ym      := $(sort $(subdir-y) $(subdir-m))
-subdir-ymn      := $(sort $(subdir-ym) $(subdir-))
+subdir-ymn := $(sort $(subdir-y) $(subdir-m) $(subdir-) \
+               $(patsubst %/,%, $(filter %/, $(obj-y) $(obj-m) $(obj-))))
 
 # Add subdir path
 
-- 
2.17.1

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