mdadm: Do not reimplment offsetof

Proper implementations have offsetof in stddef.h

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

1 files changed, 1 insertions, 3 deletions

diff --git a/super1.c b/super1.c
index 1bc5216f..7cf9b518 100644
--- a/super1.c
+++ b/super1.c
@@ -22,6 +22,7 @@
  *    Email: <neilb@suse.de>
  */
 
+#include <stddef.h>
 #include "mdadm.h"
 /*
  * The version-1 superblock :
@@ -133,9 +134,6 @@ struct misc_dev_info {
 					|MD_FEATURE_NEW_OFFSET		\
 					)
 
-#ifndef offsetof
-#define offsetof(t,f) ((size_t)&(((t*)0)->f))
-#endif
 static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
 {
 	unsigned int disk_csum, csum;