diff options
Diffstat (limited to 'kernel/reboot.c')
| -rw-r--r-- | kernel/reboot.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/reboot.c b/kernel/reboot.c index 3c35445bf5ad..3bba88c7ffc6 100644 --- a/kernel/reboot.c +++ b/kernel/reboot.c @@ -243,6 +243,17 @@ void migrate_to_reboot_cpu(void) set_cpus_allowed_ptr(current, cpumask_of(cpu)); } +/* + * Notifier list for kernel code which wants to be called + * to prepare system for restart. + */ +static BLOCKING_NOTIFIER_HEAD(restart_prep_handler_list); + +static void do_kernel_restart_prepare(void) +{ + blocking_notifier_call_chain(&restart_prep_handler_list, 0, NULL); +} + /** * kernel_restart - reboot the system * @cmd: pointer to buffer containing command to execute for restart @@ -254,6 +265,7 @@ void migrate_to_reboot_cpu(void) void kernel_restart(char *cmd) { kernel_restart_prepare(cmd); + do_kernel_restart_prepare(); migrate_to_reboot_cpu(); syscore_shutdown(); if (!cmd) @@ -396,6 +408,11 @@ register_sys_off_handler(enum sys_off_mode mode, handler->list = &power_off_handler_list; break; + case SYS_OFF_MODE_RESTART_PREPARE: + handler->list = &restart_prep_handler_list; + handler->blocking = true; + break; + case SYS_OFF_MODE_RESTART: handler->list = &restart_handler_list; break; |