Move ARRAY_SIZE macro to common include file.

That was super-ddf can use it.

Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/mdadm.h b/mdadm.h
index 91d27139..2eca6032 100644
--- a/mdadm.h
+++ b/mdadm.h
@@ -178,6 +178,8 @@ extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
 	(void) (&_max1 == &_max2);              \
 	_max1 > _max2 ? _max1 : _max2; })
 
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
 /* general information that might be extracted from a superblock */
 struct mdinfo {
 	mdu_array_info_t	array;