[S390] sparse: fix sparse static warnings

Make functions and data static to avoid sparse warnings.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/boot/compressed/misc.c b/arch/s390/boot/compressed/misc.c
index 028f23e..465eca7 100644
--- a/arch/s390/boot/compressed/misc.c
+++ b/arch/s390/boot/compressed/misc.c
@@ -61,7 +61,7 @@
 
 extern _sclp_print_early(const char *);
 
-int puts(const char *s)
+static int puts(const char *s)
 {
 	_sclp_print_early(s);
 	return 0;
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 2964583..6296809 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -276,8 +276,8 @@
 static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
 
 /* VM IPL PARM routines */
-size_t reipl_get_ascii_vmparm(char *dest, size_t size,
-				   const struct ipl_parameter_block *ipb)
+static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
+				     const struct ipl_parameter_block *ipb)
 {
 	int i;
 	size_t len;
@@ -339,8 +339,8 @@
 	return count;
 }
 
-size_t reipl_append_ascii_scpdata(char *dest, size_t size,
-				  const struct ipl_parameter_block *ipb)
+static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
+					 const struct ipl_parameter_block *ipb)
 {
 	size_t count;
 	size_t i;
diff --git a/arch/s390/kernel/kprobes.c b/arch/s390/kernel/kprobes.c
index 1d05d66..64b761a 100644
--- a/arch/s390/kernel/kprobes.c
+++ b/arch/s390/kernel/kprobes.c
@@ -635,7 +635,7 @@
 	asm volatile(".word 0x0002");
 }
 
-void __kprobes jprobe_return_end(void)
+static void __used __kprobes jprobe_return_end(void)
 {
 	asm volatile("bcr 0,0");
 }
diff --git a/arch/s390/kernel/vtime.c b/arch/s390/kernel/vtime.c
index 4f3de98..bb48977 100644
--- a/arch/s390/kernel/vtime.c
+++ b/arch/s390/kernel/vtime.c
@@ -461,7 +461,7 @@
 }
 EXPORT_SYMBOL(add_virt_timer_periodic);
 
-int __mod_vtimer(struct vtimer_list *timer, __u64 expires, int periodic)
+static int __mod_vtimer(struct vtimer_list *timer, __u64 expires, int periodic)
 {
 	struct vtimer_queue *vq;
 	unsigned long flags;