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[PATCH 05/28] tools include: Move ARRAY_SIZE() to linux/kernel.h

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From: Arnaldo Carvalho de Melo <acme@redhat.com>

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 adb4d0147755..73ccc48126bb 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 df13658377e4..3eccd6f21d17 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
-- 
2.9.3

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[PATCH 05/28] tools include: Move ARRAY_SIZE() to linux/kernel.h Arnaldo Carvalho de Melo <acme@kernel.org> - 2017-04-19 18:20 +0200

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