selftests: add EXTRA_CLEAN for clean target

Some testcases need the clean extra data after running. This patch
introduce the "EXTRA_CLEAN" variable to address this requirement.

After KBUILD_OUTPUT is enabled in later patch, it will be easy to
decide to if we need do the cleanup in the KBUILD_OUTPUT path(if the
testcase ran immediately after compiled).

Signed-off-by: Bamvor Jian Zhang <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/exec/Makefile

···
 CFLAGS = -Wall
 
+TEST_GEN_PROGS := execveat
+TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir
+# Makefile is a run-time dependency, since it's accessed by the execveat test
+TEST_FILES := Makefile
+
+EXTRA_CLEAN := subdir.moved execveat.moved xxxxx*
+
+include ../lib.mk
+
 subdir:
 	mkdir -p $@
 script:
···
 execveat.denatured: execveat
 	cp $< $@
 	chmod -x $@
-
-TEST_GEN_PROGS := execveat
-TEST_GEN_FILES := execveat.symlink execveat.denatured script subdir
-# Makefile is a run-time dependency, since it's accessed by the execveat test
-TEST_FILES := Makefile
-
-include ../lib.mk
-
-clean:
-	rm -rf $(TEST_GEN_PROGS) $(TEST_GEN_FILES) subdir.moved execveat.moved xxxxx*

tools/testing/selftests/ftrace/Makefile

···
 
 TEST_PROGS := ftracetest
 TEST_FILES := test.d
+EXTRA_CLEAN := logs/*
 
 include ../lib.mk
-
-clean:
-	rm -rf logs/*

tools/testing/selftests/kcmp/Makefile

···
 
 TEST_GEN_PROGS := kcmp_test
 
+EXTRA_CLEAN := kcmp-test-file
+
 include ../lib.mk
 
-clean:
-	$(RM) $(TEST_GEN_PROGS) kcmp-test-file

tools/testing/selftests/lib.mk

···
 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
 
 clean:
-	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
+	$(RM) -r $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES) $(EXTRA_CLEAN)
 
 %: %.c
 	$(CC) $(CFLAGS) $(LDFLAGS) $(LDLIBS) -o $@ $^

tools/testing/selftests/powerpc/switch_endian/Makefile

···
 
 ASFLAGS += -O2 -Wall -g -nostdlib -m64
 
+EXTRA_CLEAN = *.o check-reversed.S
+
 include ../../lib.mk
 
 switch_endian_test: check-reversed.S
···
 
 check-reversed.S: check-reversed.o
 	hexdump -v -e '/1 ".byte 0x%02X\n"' $< > $@
-
-clean:
-	$(RM) $(TEST_GEN_PROGS) *.o check-reversed.S

tools/testing/selftests/pstore/Makefile

···
 
 TEST_PROGS := pstore_tests pstore_post_reboot_tests
 TEST_FILES := common_tests pstore_crash_test
+EXTRA_CLEAN := logs/* *uuid
 
 include ../lib.mk
 
 run_crash:
 	@sh pstore_crash_test || { echo "pstore_crash_test: [FAIL]"; exit 1; }
-
-clean:
-	rm -rf logs/* *uuid

tools/testing/selftests/zram/Makefile

···
 
 TEST_PROGS := zram.sh
 TEST_FILES := zram01.sh zram02.sh zram_lib.sh
+EXTRA_CLEAN := err.log
 
 include ../lib.mk
 
-clean:
-	$(RM) err.log