xen: fix build when SYSRQ is disabled

Fix build error when CONFIG_MAGIC_SYSRQ is not enabled:

drivers/xen/manage.c:223: error: implicit declaration of function 'handle_sysrq'

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Acked-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 8943b8c..07e857b 100644 (file)
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -185,6 +185,7 @@ static void shutdown_handler(struct xenbus_watch *watch,
        kfree(str);
 }
 
+#ifdef CONFIG_MAGIC_SYSRQ
 static void sysrq_handler(struct xenbus_watch *watch, const char **vec,
                          unsigned int len)
 {
@@ -214,15 +215,16 @@ static void sysrq_handler(struct xenbus_watch *watch, const char **vec,
                handle_sysrq(sysrq_key, NULL);
 }
 
-static struct xenbus_watch shutdown_watch = {
-       .node = "control/shutdown",
-       .callback = shutdown_handler
-};
-
 static struct xenbus_watch sysrq_watch = {
        .node = "control/sysrq",
        .callback = sysrq_handler
 };
+#endif
+
+static struct xenbus_watch shutdown_watch = {
+       .node = "control/shutdown",
+       .callback = shutdown_handler
+};
 
 static int setup_shutdown_watcher(void)
 {
@@ -234,11 +236,13 @@ static int setup_shutdown_watcher(void)
                return err;
        }
 
+#ifdef CONFIG_MAGIC_SYSRQ
        err = register_xenbus_watch(&sysrq_watch);
        if (err) {
                printk(KERN_ERR "Failed to set sysrq watcher\n");
                return err;
        }
+#endif
 
        return 0;
 }