[NET]: Fix obvious 64bit bug/warning in farsync.c

diff --git a/drivers/net/wan/farsync.c b/drivers/net/wan/farsync.c
index 73e2ebea0fea097dd8000576602a190f035d867f..66170e0a945d4712e7d666641a2085c90a3f7e58 100644 (file)
--- a/drivers/net/wan/farsync.c
+++ b/drivers/net/wan/farsync.c
@@ -317,7 +317,7 @@ struct buf_window {
 };
 
 /* Calculate offset of a buffer object within the shared memory window */
-#define BUF_OFFSET(X)   ((unsigned int)&(((struct buf_window *)BFM_BASE)->X))
+#define BUF_OFFSET(X)   offsetof(struct buf_window, X)
 
 #pragma pack()