util: add common ARRAY_SIZE define

I want to use this in more places, so put it in util.h rather than
copying & pasting it into another file.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 2 insertions, 0 deletions

diff --git a/util.h b/util.h
index 7b9a840..8f40b44 100644
--- a/util.h
+++ b/util.h
@@ -24,6 +24,8 @@
  *                                                                   USA
  */
 
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
 static inline void __attribute__((noreturn)) die(const char *str, ...)
 {
 	va_list ap;