[tip:perf/core] tools include: Move ARRAY_SIZE() to linux/kernel.h

[tip-bot for Arnaldo Carvalho de Melo <tipbot@zytor.com>]

Commit-ID:  8607c1ee734d12f62c6a46abef13a510e25a1839
Gitweb:     http://git.kernel.org/tip/8607c1ee734d12f62c6a46abef13a510e25a1839
Author:     Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Mon, 17 Apr 2017 11:29:26 -0300
Committer:  Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 19 Apr 2017 13:01:43 -0300

tools include: Move ARRAY_SIZE() to linux/kernel.h

To match the kernel, then look for places redefining it to make it use
this version, which checks that its parameter is an array at build time.

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-txlcf1im83bcbj6kh0wxmyy8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/include/linux/kernel.h | 3 +++
 tools/perf/util/util.h       | 2 --
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/include/linux/kernel.h b/tools/include/linux/kernel.h
index adb4d01..73ccc48 100644
--- a/tools/include/linux/kernel.h
+++ b/tools/include/linux/kernel.h
@@ -4,6 +4,7 @@
 #include <stdarg.h>
 #include <stddef.h>
 #include <assert.h>
+#include <linux/compiler.h>
 
 #ifndef UINT_MAX
 #define UINT_MAX	(~0U)
@@ -76,6 +77,8 @@
 int vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
 int scnprintf(char * buf, size_t size, const char * fmt, ...);
 
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) + __must_be_array(arr))
+
 /*
  * This looks more complex than it should be. But we need to
  * get the type for the ~ right in round_down (it needs to be
diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
index df13658..3eccd6f 100644
--- a/tools/perf/util/util.h
+++ b/tools/perf/util/util.h
@@ -1,8 +1,6 @@
 #ifndef GIT_COMPAT_UTIL_H
 #define GIT_COMPAT_UTIL_H
 
-#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
-
 #ifdef __GNUC__
 #define TYPEOF(x) (__typeof__(x))
 #else