[S390] Get rid of a lot of sparse warnings.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index 075e619..f64b8c8 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -34,7 +34,7 @@
  * book:
  * http://oss.software.ibm.com/developerworks/opensource/linux390/index.shtml
  */
-struct appldata_net_sum_data {
+static struct appldata_net_sum_data {
 	u64 timestamp;
 	u32 sync_count_1;	/* after VM collected the record data, */
 	u32 sync_count_2;	/* sync_count_1 and sync_count_2 should be the