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Subject[PATCH 1/5] ARM: xen: Register with kernel restart handler
Date
From: Guenter Roeck <linux@roeck-us.net>

Register with kernel restart handler instead of setting arm_pm_restart
directly.

Select a high priority of 192 to ensure that default restart handlers
are replaced if Xen is running.

Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
arch/arm/xen/enlighten.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c
index 8ad576ecd0f1d..7f1c106b746f8 100644
--- a/arch/arm/xen/enlighten.c
+++ b/arch/arm/xen/enlighten.c
@@ -29,6 +29,7 @@
#include <linux/cpu.h>
#include <linux/console.h>
#include <linux/pvclock_gtod.h>
+#include <linux/reboot.h>
#include <linux/time64.h>
#include <linux/timekeeping.h>
#include <linux/timekeeper_internal.h>
@@ -181,11 +182,18 @@ void xen_reboot(int reason)
BUG_ON(rc);
}

-static void xen_restart(enum reboot_mode reboot_mode, const char *cmd)
+static int xen_restart(struct notifier_block *nb, unsigned long action,
+ void *data)
{
xen_reboot(SHUTDOWN_reboot);
+
+ return NOTIFY_DONE;
}

+static struct notifier_block xen_restart_nb = {
+ .notifier_call = xen_restart,
+ .priority = 192,
+};

static void xen_power_off(void)
{
@@ -404,7 +412,7 @@ static int __init xen_pm_init(void)
return -ENODEV;

pm_power_off = xen_power_off;
- arm_pm_restart = xen_restart;
+ register_restart_handler(&xen_restart_nb);
if (!xen_initial_domain()) {
struct timespec64 ts;
xen_read_wallclock(&ts);
--
2.31.1
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