sh: fix no sys_timer case

Handle the case with a sys_timer set to NULL.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 9 insertions, 1 deletions

diff --git a/arch/sh/kernel/time_32.c b/arch/sh/kernel/time_32.c
index ca22eef669ae..766554ba2a5b 100644
--- a/arch/sh/kernel/time_32.c
+++ b/arch/sh/kernel/time_32.c
@@ -181,7 +181,12 @@ static struct sysdev_class timer_sysclass = {
 
 static int __init timer_init_sysfs(void)
 {
-        int ret = sysdev_class_register(&timer_sysclass);
+        int ret;
+
+        if (!sys_timer)
+                return 0;
+
+        ret = sysdev_class_register(&timer_sysclass);
         if (ret != 0)
                 return ret;
 
@@ -230,5 +235,8 @@ void __init time_init(void)
          * initialized for us.
          */
         sys_timer = get_sys_timer();
+        if (unlikely(!sys_timer))
+                panic("System timer missing.\n");
+
         printk(KERN_INFO "Using %s for system timer\n", sys_timer->name);
 }