perf tools: Add include <linux/kernel.h> where ARRAY_SIZE() is used

To pave the way for further cleanups where linux/kernel.h may stop being
included in some header.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-qqxan6tfsl6qx3l0v3nwgjvk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
index 1e2ba2602930..de6498dc4cbb 100644
--- a/tools/perf/tests/pmu.c
+++ b/tools/perf/tests/pmu.c
@@ -2,6 +2,7 @@
 #include "pmu.h"
 #include "util.h"
 #include "tests.h"
+#include <linux/kernel.h>
 
 /* Simulated format definitions. */
 static struct test_format {