[PATCH v2 -next] perf test: Use ARRAY_SIZE for array length

[Jiapeng Chong <jiapeng.chong@linux.alibaba.com>]

Use of macro ARRAY_SIZE to calculate array size minimizes
the redundant code and improves code reusability.

./tools/perf/tests/demangle-java-test.c:31:34-35: WARNING: Use ARRAY_SIZE.

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=11173
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
---
Changes in v2:
  -Modify the header file "kselftest.h" to "linux/kernel.h".

 tools/perf/tests/demangle-java-test.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/demangle-java-test.c b/tools/perf/tests/demangle-java-test.c
index 44d1be303b67..93c94408bdc8 100644
--- a/tools/perf/tests/demangle-java-test.c
+++ b/tools/perf/tests/demangle-java-test.c
@@ -2,6 +2,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <linux/kernel.h>
 #include "tests.h"
 #include "session.h"
 #include "debug.h"
@@ -28,7 +29,7 @@ static int test__demangle_java(struct test_suite *test __maybe_unused, int subte
 		  "void java.lang.Object<init>()" },
 	};
 
-	for (i = 0; i < sizeof(test_cases) / sizeof(test_cases[0]); i++) {
+	for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
 		buf = java_demangle_sym(test_cases[i].mangled, 0);
 		if (strcmp(buf, test_cases[i].demangled)) {
 			pr_debug("FAILED: %s: %s != %s\n", test_cases[i].mangled,
-- 
2.32.0.3.g01195cf9f