From: Dmitry Osipenko Date: Mon, 9 May 2022 23:32:13 +0000 (+0300) Subject: kernel/reboot: Add do_kernel_power_off() X-Git-Tag: v5.19-rc1~94^2^2~2^2~22 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=2b6aa7332f8020dfdaffe340ff038aac4df35238;p=thirdparty%2Fkernel%2Flinux.git kernel/reboot: Add do_kernel_power_off() Add do_kernel_power_off() helper that will remove open-coded pm_power_off invocations from the architecture code. This is the first step on the way to remove the global pm_power_off variable, which will allow us to implement consistent power-off chaining support. Signed-off-by: Dmitry Osipenko Signed-off-by: Rafael J. Wysocki --- diff --git a/include/linux/reboot.h b/include/linux/reboot.h index b79f8942ea5f4..99a9753e77bca 100644 --- a/include/linux/reboot.h +++ b/include/linux/reboot.h @@ -63,6 +63,8 @@ extern void machine_shutdown(void); struct pt_regs; extern void machine_crash_shutdown(struct pt_regs *); +void do_kernel_power_off(void); + /* * sys-off handler API. */ diff --git a/kernel/reboot.c b/kernel/reboot.c index 96f681f7b20c7..892d25aa12df5 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -504,6 +504,19 @@ static void do_kernel_power_off_prepare(void) blocking_notifier_call_chain(&power_off_prep_handler_list, 0, NULL); } +/** + * do_kernel_power_off - Execute kernel power-off handler call chain + * + * Expected to be called as last step of the power-off sequence. + * + * Powers off the system immediately if a power-off handler function has + * been registered. Otherwise does nothing. + */ +void do_kernel_power_off(void) +{ + atomic_notifier_call_chain(&power_off_handler_list, 0, NULL); +} + /** * kernel_power_off - power_off the system *