[PATCH v5 3/7] arm: Support restart through restart handler call chain

Guenter Roeck
2014-07-18T07:36:55Z

The kernel core now supports a restart handler 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 kernel restart handler
if arm_pm_restart is not set.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
v5: Renamed restart function to do_kernel_restart
v4: No change.
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..84ca0d5 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
+ do_kernel_restart(cmd);

/* Give a grace period for failure to restart of 1s */
mdelay(1000);
--
1.9.1