[PATCH v3 1/5] Mini-OS: make xenstore_buf externally visible

[Juergen Gross <jgross@xxxxxxxx>]

For support of the 9pfs frontend in Xenstore-stubdom xenstore_buf
needs to be externally visible.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Jason Andryuk <jandryuk@xxxxxxxxx>
---
 include/xenbus.h | 2 ++
 xenbus.c         | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/xenbus.h b/include/xenbus.h
index c0fc0ac5..542ee456 100644
--- a/include/xenbus.h
+++ b/include/xenbus.h
@@ -8,12 +8,14 @@ typedef unsigned long xenbus_transaction_t;
 
 #ifdef CONFIG_XENBUS
 extern uint32_t xenbus_evtchn;
+extern struct xenstore_domain_interface *xenstore_buf;
 
 /* Initialize the XenBus system. */
 void init_xenbus(void);
 void get_xenbus(void *p);
 #else
 #define xenbus_evtchn ~0
+#define xenstore_buf NULL
 
 static inline void init_xenbus(void)
 {
diff --git a/xenbus.c b/xenbus.c
index 923e8181..8bfd5bd4 100644
--- a/xenbus.c
+++ b/xenbus.c
@@ -44,7 +44,7 @@
 #define DEBUG(_f, _a...)    ((void)0)
 #endif
 
-static struct xenstore_domain_interface *xenstore_buf;
+struct xenstore_domain_interface *xenstore_buf;
 static DECLARE_WAIT_QUEUE_HEAD(xb_waitq);
 DECLARE_WAIT_QUEUE_HEAD(xenbus_watch_queue);
 static __DECLARE_SEMAPHORE_GENERIC(xb_write_sem, 1);
-- 
2.35.3