The kernel core now supports a notifier call chain for system
restart functions.

With this change, the arm_pm_restart callback is now optional,
so check if it is set before calling it. Only call the notifier
functions if arm_pm_restart is not set.

Signed-off-by: Guenter Roeck <li...@roeck-us.net>
---
v3: Use wrapper function to execute notifier call chain.
v2: Only call notifier call chain if arm_pm_restart is not set.
    Do not include linux/watchdog.h.

 arch/arm/kernel/process.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 81ef686..5d191e3 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -230,7 +230,10 @@ void machine_restart(char *cmd)
        local_irq_disable();
        smp_send_stop();
 
-       arm_pm_restart(reboot_mode, cmd);
+       if (arm_pm_restart)
+               arm_pm_restart(reboot_mode, cmd);
+       else
+               kernel_restart_notify(cmd);
 
        /* Give a grace period for failure to restart of 1s */
        mdelay(1000);
-- 
1.9.1

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