5 files changed, 7 insertions, 5 deletions
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c
index 115d8bbac6..b678d5ebb8 100644
--- a/pc-bios/s390-ccw/bootmap.c
+++ b/pc-bios/s390-ccw/bootmap.c
@@ -33,7 +33,7 @@ typedef struct ResetInfo {
     uint32_t ipl_continue;
 } ResetInfo;
 
-ResetInfo save;
+static ResetInfo save;
 
 static void jump_to_IPL_2(void)
 {
@@ -80,7 +80,7 @@ static void jump_to_IPL_code(uint64_t address)
  */
 
 static unsigned char _bprs[8*1024]; /* guessed "max" ECKD sector size */
-const int max_bprs_entries = sizeof(_bprs) / sizeof(ExtEckdBlockPtr);
+static const int max_bprs_entries = sizeof(_bprs) / sizeof(ExtEckdBlockPtr);
 
 static inline void verify_boot_info(BootInfo *bip)
 {
diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h
index 6a4823d544..ab132e3579 100644
--- a/pc-bios/s390-ccw/bootmap.h
+++ b/pc-bios/s390-ccw/bootmap.h
@@ -15,7 +15,7 @@
 #include "virtio.h"
 
 typedef uint64_t block_number_t;
-#define NULL_BLOCK_NR 0xffffffffffffffff
+#define NULL_BLOCK_NR 0xffffffffffffffffULL
 
 #define FREE_SPACE_FILLER '\xAA'
 
diff --git a/pc-bios/s390-ccw/main.c b/pc-bios/s390-ccw/main.c
index f9ec2157ad..6f707bbcd4 100644
--- a/pc-bios/s390-ccw/main.c
+++ b/pc-bios/s390-ccw/main.c
@@ -13,7 +13,7 @@
 
 char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
 uint64_t boot_value;
-struct subchannel_id blk_schid = { .one = 1 };
+static struct subchannel_id blk_schid = { .one = 1 };
 
 /*
  * Priniciples of Operations (SA22-7832-09) chapter 17 requires that
diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h
index 2b773deafa..ceb7418a50 100644
--- a/pc-bios/s390-ccw/s390-ccw.h
+++ b/pc-bios/s390-ccw/s390-ccw.h
@@ -51,6 +51,8 @@ void disabled_wait(void);
 /* main.c */
 void virtio_panic(const char *string);
 void write_subsystem_identification(void);
+extern char stack[PAGE_SIZE * 8] __attribute__((__aligned__(PAGE_SIZE)));
+extern uint64_t boot_value;
 
 /* sclp-ascii.c */
 void sclp_print(const char *string);
diff --git a/pc-bios/s390-ccw/virtio.c b/pc-bios/s390-ccw/virtio.c
index c0540d1cd4..4dc91a7c43 100644
--- a/pc-bios/s390-ccw/virtio.c
+++ b/pc-bios/s390-ccw/virtio.c
@@ -11,7 +11,7 @@
 #include "s390-ccw.h"
 #include "virtio.h"
 
-struct vring block;
+static struct vring block;
 
 static char chsc_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE)));