Messages in this thread Patch in this message | | | From | Lee Jones <> | Subject | [PATCH 3/5] ARM: Register with kernel restart handler | Date | Fri, 4 Jun 2021 15:03:55 +0100 |
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From: Guenter Roeck <linux@roeck-us.net>
By making use of the kernel restart handler, board specific restart handlers can be prioritized amongst available mechanisms for a particular board or system.
Select the default priority of 128 to indicate that the restart callback in the machine description is the default restart mechanism.
Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.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/kernel/setup.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 1a5edf562e85e..08c5676477d70 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -1081,6 +1081,20 @@ void __init hyp_mode_check(void) #endif } +static void (*__arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); + +static int arm_restart(struct notifier_block *nb, unsigned long action, + void *data) +{ + __arm_pm_restart(action, data); + return NOTIFY_DONE; +} + +static struct notifier_block arm_restart_nb = { + .notifier_call = arm_restart, + .priority = 128, +}; + void __init setup_arch(char **cmdline_p) { const struct machine_desc *mdesc = NULL; @@ -1149,8 +1163,10 @@ void __init setup_arch(char **cmdline_p) kasan_init(); request_standard_resources(mdesc); - if (mdesc->restart) - arm_pm_restart = mdesc->restart; + if (mdesc->restart) { + __arm_pm_restart = mdesc->restart; + register_restart_handler(&arm_restart_nb); + } unflatten_device_tree(); -- 2.31.1
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