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[v4,3/7] arm: Support restart through restart notifier call chain

Message ID 1405265431-4561-4-git-send-email-linux@roeck-us.net (mailing list archive)
State New, archived
Headers show

Commit Message

Guenter Roeck July 13, 2014, 3:30 p.m. UTC 
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 <linux@roeck-us.net>
---
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(-)
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Patch

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);