Fix offsetof macro for 64bit hosts

2 files changed, 1 insertions, 1 deletions

diff --git a/ANNOUNCE-2.5.1 b/ANNOUNCE-2.5.1
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/ANNOUNCE-2.5.1
diff --git a/super1.c b/super1.c
index 28332cd..9dc6644 100644
--- a/super1.c
+++ b/super1.c
@@ -104,7 +104,7 @@ struct mdp_superblock_1 {
 #define	MD_FEATURE_ALL			(1|2|4)
 
 #ifndef offsetof
-#define offsetof(t,f) ((int)&(((t*)0)->f))
+#define offsetof(t,f) ((size_t)&(((t*)0)->f))
 #endif
 static unsigned int calc_sb_1_csum(struct mdp_superblock_1 * sb)
 {