Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/tools/perf/lib/tests/Makefile b/tools/perf/lib/tests/Makefile
new file mode 100644
index 0000000..1ee4e9b
--- /dev/null
+++ b/tools/perf/lib/tests/Makefile
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
+
+TESTS = test-cpumap test-threadmap test-evlist test-evsel
+
+TESTS_SO := $(addsuffix -so,$(TESTS))
+TESTS_A  := $(addsuffix -a,$(TESTS))
+
+# Set compile option CFLAGS
+ifdef EXTRA_CFLAGS
+  CFLAGS := $(EXTRA_CFLAGS)
+else
+  CFLAGS := -g -Wall
+endif
+
+all:
+
+include $(srctree)/tools/scripts/Makefile.include
+
+INCLUDE = -I$(srctree)/tools/perf/lib/include -I$(srctree)/tools/include
+
+$(TESTS_A): FORCE
+	$(QUIET_LINK)$(CC) $(INCLUDE) $(CFLAGS) -o $@ $(subst -a,.c,$@) ../libperf.a
+
+$(TESTS_SO): FORCE
+	$(QUIET_LINK)$(CC) $(INCLUDE) $(CFLAGS) -L.. -o $@ $(subst -so,.c,$@) -lperf
+
+all: $(TESTS_A) $(TESTS_SO)
+
+run:
+	@echo "running static:"
+	@for i in $(TESTS_A); do ./$$i; done
+	@echo "running dynamic:"
+	@for i in $(TESTS_SO); do LD_LIBRARY_PATH=../ ./$$i; done
+
+clean:
+	$(call QUIET_CLEAN, tests)$(RM) $(TESTS_A) $(TESTS_SO)
+
+.PHONY: all clean FORCE