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    Subject[PATCH -v8 04/11] Move shutdown/reboot related functions to kernel/reboot.c
    Date
    This patch is preparatory.  It moves reboot related syscall, etc
    functions from kernel/sys.c to kernel/reboot.c.

    Signed-off-by: Robin Holt <holt@sgi.com>
    To: Andrew Morton <akpm@linux-foundation.org>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Russ Anderson <rja@sgi.com>
    Cc: Robin Holt <holt@sgi.com>
    Cc: Russell King <linux@arm.linux.org.uk>
    Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
    Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
    Cc: the arch/x86 maintainers <x86@kernel.org>
    Cc: Arm Mailing List <linux-arm-kernel@lists.infradead.org>

    ---

    Changes since -v6:
    - Add include of linux/uaccess.h to allow building on arm.
    ---
    kernel/Makefile | 2 +-
    kernel/reboot.c | 347 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
    kernel/sys.c | 331 -----------------------------------------------------
    3 files changed, 348 insertions(+), 332 deletions(-)
    create mode 100644 kernel/reboot.c

    diff --git a/kernel/Makefile b/kernel/Makefile
    index 271fd31..470839d 100644
    --- a/kernel/Makefile
    +++ b/kernel/Makefile
    @@ -9,7 +9,7 @@ obj-y = fork.o exec_domain.o panic.o printk.o \
    rcupdate.o extable.o params.o posix-timers.o \
    kthread.o wait.o sys_ni.o posix-cpu-timers.o mutex.o \
    hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \
    - notifier.o ksysfs.o cred.o \
    + notifier.o ksysfs.o cred.o reboot.o \
    async.o range.o groups.o lglock.o smpboot.o

    ifdef CONFIG_FUNCTION_TRACER
    diff --git a/kernel/reboot.c b/kernel/reboot.c
    new file mode 100644
    index 0000000..169f0b6
    --- /dev/null
    +++ b/kernel/reboot.c
    @@ -0,0 +1,347 @@
    +/*
    + * linux/kernel/reboot.c
    + *
    + * Copyright (C) 2013 Linus Torvalds
    + */
    +
    +#include <linux/export.h>
    +#include <linux/kexec.h>
    +#include <linux/kmod.h>
    +#include <linux/kmsg_dump.h>
    +#include <linux/reboot.h>
    +#include <linux/suspend.h>
    +#include <linux/syscalls.h>
    +#include <linux/syscore_ops.h>
    +#include <linux/uaccess.h>
    +
    +/*
    + * this indicates whether you can reboot with ctrl-alt-del: the default is yes
    + */
    +
    +int C_A_D = 1;
    +struct pid *cad_pid;
    +EXPORT_SYMBOL(cad_pid);
    +
    +/*
    + * If set, this is used for preparing the system to power off.
    + */
    +
    +void (*pm_power_off_prepare)(void);
    +
    +/**
    + * emergency_restart - reboot the system
    + *
    + * Without shutting down any hardware or taking any locks
    + * reboot the system. This is called when we know we are in
    + * trouble so this is our best effort to reboot. This is
    + * safe to call in interrupt context.
    + */
    +void emergency_restart(void)
    +{
    + kmsg_dump(KMSG_DUMP_EMERG);
    + machine_emergency_restart();
    +}
    +EXPORT_SYMBOL_GPL(emergency_restart);
    +
    +void kernel_restart_prepare(char *cmd)
    +{
    + blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
    + system_state = SYSTEM_RESTART;
    + usermodehelper_disable();
    + device_shutdown();
    +}
    +
    +/**
    + * register_reboot_notifier - Register function to be called at reboot time
    + * @nb: Info about notifier function to be called
    + *
    + * Registers a function with the list of functions
    + * to be called at reboot time.
    + *
    + * Currently always returns zero, as blocking_notifier_chain_register()
    + * always returns zero.
    + */
    +int register_reboot_notifier(struct notifier_block *nb)
    +{
    + return blocking_notifier_chain_register(&reboot_notifier_list, nb);
    +}
    +EXPORT_SYMBOL(register_reboot_notifier);
    +
    +/**
    + * unregister_reboot_notifier - Unregister previously registered reboot notifier
    + * @nb: Hook to be unregistered
    + *
    + * Unregisters a previously registered reboot
    + * notifier function.
    + *
    + * Returns zero on success, or %-ENOENT on failure.
    + */
    +int unregister_reboot_notifier(struct notifier_block *nb)
    +{
    + return blocking_notifier_chain_unregister(&reboot_notifier_list, nb);
    +}
    +EXPORT_SYMBOL(unregister_reboot_notifier);
    +
    +static void migrate_to_reboot_cpu(void)
    +{
    + /* The boot cpu is always logical cpu 0 */
    + int reboot_cpu = 0;
    +
    + cpu_hotplug_disable();
    +
    + /* Make certain the cpu I'm about to reboot on is online */
    + if (!cpu_online(reboot_cpu))
    + reboot_cpu = cpumask_first(cpu_online_mask);
    +
    + /* Prevent races with other tasks migrating this task */
    + current->flags |= PF_NO_SETAFFINITY;
    +
    + /* Make certain I only run on the appropriate processor */
    + set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu));
    +}
    +
    +/**
    + * kernel_restart - reboot the system
    + * @cmd: pointer to buffer containing command to execute for restart
    + * or %NULL
    + *
    + * Shutdown everything and perform a clean reboot.
    + * This is not safe to call in interrupt context.
    + */
    +void kernel_restart(char *cmd)
    +{
    + kernel_restart_prepare(cmd);
    + migrate_to_reboot_cpu();
    + syscore_shutdown();
    + if (!cmd)
    + printk(KERN_EMERG "Restarting system.\n");
    + else
    + printk(KERN_EMERG "Restarting system with command '%s'.\n", cmd);
    + kmsg_dump(KMSG_DUMP_RESTART);
    + machine_restart(cmd);
    +}
    +EXPORT_SYMBOL_GPL(kernel_restart);
    +
    +static void kernel_shutdown_prepare(enum system_states state)
    +{
    + blocking_notifier_call_chain(&reboot_notifier_list,
    + (state == SYSTEM_HALT)?SYS_HALT:SYS_POWER_OFF, NULL);
    + system_state = state;
    + usermodehelper_disable();
    + device_shutdown();
    +}
    +/**
    + * kernel_halt - halt the system
    + *
    + * Shutdown everything and perform a clean system halt.
    + */
    +void kernel_halt(void)
    +{
    + kernel_shutdown_prepare(SYSTEM_HALT);
    + migrate_to_reboot_cpu();
    + syscore_shutdown();
    + printk(KERN_EMERG "System halted.\n");
    + kmsg_dump(KMSG_DUMP_HALT);
    + machine_halt();
    +}
    +
    +EXPORT_SYMBOL_GPL(kernel_halt);
    +
    +/**
    + * kernel_power_off - power_off the system
    + *
    + * Shutdown everything and perform a clean system power_off.
    + */
    +void kernel_power_off(void)
    +{
    + kernel_shutdown_prepare(SYSTEM_POWER_OFF);
    + if (pm_power_off_prepare)
    + pm_power_off_prepare();
    + migrate_to_reboot_cpu();
    + syscore_shutdown();
    + printk(KERN_EMERG "Power down.\n");
    + kmsg_dump(KMSG_DUMP_POWEROFF);
    + machine_power_off();
    +}
    +EXPORT_SYMBOL_GPL(kernel_power_off);
    +
    +static DEFINE_MUTEX(reboot_mutex);
    +
    +/*
    + * Reboot system call: for obvious reasons only root may call it,
    + * and even root needs to set up some magic numbers in the registers
    + * so that some mistake won't make this reboot the whole machine.
    + * You can also set the meaning of the ctrl-alt-del-key here.
    + *
    + * reboot doesn't sync: do that yourself before calling this.
    + */
    +SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
    + void __user *, arg)
    +{
    + struct pid_namespace *pid_ns = task_active_pid_ns(current);
    + char buffer[256];
    + int ret = 0;
    +
    + /* We only trust the superuser with rebooting the system. */
    + if (!ns_capable(pid_ns->user_ns, CAP_SYS_BOOT))
    + return -EPERM;
    +
    + /* For safety, we require "magic" arguments. */
    + if (magic1 != LINUX_REBOOT_MAGIC1 ||
    + (magic2 != LINUX_REBOOT_MAGIC2 &&
    + magic2 != LINUX_REBOOT_MAGIC2A &&
    + magic2 != LINUX_REBOOT_MAGIC2B &&
    + magic2 != LINUX_REBOOT_MAGIC2C))
    + return -EINVAL;
    +
    + /*
    + * If pid namespaces are enabled and the current task is in a child
    + * pid_namespace, the command is handled by reboot_pid_ns() which will
    + * call do_exit().
    + */
    + ret = reboot_pid_ns(pid_ns, cmd);
    + if (ret)
    + return ret;
    +
    + /* Instead of trying to make the power_off code look like
    + * halt when pm_power_off is not set do it the easy way.
    + */
    + if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
    + cmd = LINUX_REBOOT_CMD_HALT;
    +
    + mutex_lock(&reboot_mutex);
    + switch (cmd) {
    + case LINUX_REBOOT_CMD_RESTART:
    + kernel_restart(NULL);
    + break;
    +
    + case LINUX_REBOOT_CMD_CAD_ON:
    + C_A_D = 1;
    + break;
    +
    + case LINUX_REBOOT_CMD_CAD_OFF:
    + C_A_D = 0;
    + break;
    +
    + case LINUX_REBOOT_CMD_HALT:
    + kernel_halt();
    + do_exit(0);
    + panic("cannot halt");
    +
    + case LINUX_REBOOT_CMD_POWER_OFF:
    + kernel_power_off();
    + do_exit(0);
    + break;
    +
    + case LINUX_REBOOT_CMD_RESTART2:
    + if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0) {
    + ret = -EFAULT;
    + break;
    + }
    + buffer[sizeof(buffer) - 1] = '\0';
    +
    + kernel_restart(buffer);
    + break;
    +
    +#ifdef CONFIG_KEXEC
    + case LINUX_REBOOT_CMD_KEXEC:
    + ret = kernel_kexec();
    + break;
    +#endif
    +
    +#ifdef CONFIG_HIBERNATION
    + case LINUX_REBOOT_CMD_SW_SUSPEND:
    + ret = hibernate();
    + break;
    +#endif
    +
    + default:
    + ret = -EINVAL;
    + break;
    + }
    + mutex_unlock(&reboot_mutex);
    + return ret;
    +}
    +
    +static void deferred_cad(struct work_struct *dummy)
    +{
    + kernel_restart(NULL);
    +}
    +
    +/*
    + * This function gets called by ctrl-alt-del - ie the keyboard interrupt.
    + * As it's called within an interrupt, it may NOT sync: the only choice
    + * is whether to reboot at once, or just ignore the ctrl-alt-del.
    + */
    +void ctrl_alt_del(void)
    +{
    + static DECLARE_WORK(cad_work, deferred_cad);
    +
    + if (C_A_D)
    + schedule_work(&cad_work);
    + else
    + kill_cad_pid(SIGINT, 1);
    +}
    +
    +
    +char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
    +
    +static int __orderly_poweroff(bool force)
    +{
    + char **argv;
    + static char *envp[] = {
    + "HOME=/",
    + "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
    + NULL
    + };
    + int ret;
    +
    + argv = argv_split(GFP_KERNEL, poweroff_cmd, NULL);
    + if (argv) {
    + ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
    + argv_free(argv);
    + } else {
    + printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
    + __func__, poweroff_cmd);
    + ret = -ENOMEM;
    + }
    +
    + if (ret && force) {
    + printk(KERN_WARNING "Failed to start orderly shutdown: "
    + "forcing the issue\n");
    + /*
    + * I guess this should try to kick off some daemon to sync and
    + * poweroff asap. Or not even bother syncing if we're doing an
    + * emergency shutdown?
    + */
    + emergency_sync();
    + kernel_power_off();
    + }
    +
    + return ret;
    +}
    +
    +static bool poweroff_force;
    +
    +static void poweroff_work_func(struct work_struct *work)
    +{
    + __orderly_poweroff(poweroff_force);
    +}
    +
    +static DECLARE_WORK(poweroff_work, poweroff_work_func);
    +
    +/**
    + * orderly_poweroff - Trigger an orderly system poweroff
    + * @force: force poweroff if command execution fails
    + *
    + * This may be called from any context to trigger a system shutdown.
    + * If the orderly shutdown fails, it will force an immediate shutdown.
    + */
    +int orderly_poweroff(bool force)
    +{
    + if (force) /* do not override the pending "true" */
    + poweroff_force = true;
    + schedule_work(&poweroff_work);
    + return 0;
    +}
    +EXPORT_SYMBOL_GPL(orderly_poweroff);
    diff --git a/kernel/sys.c b/kernel/sys.c
    index 91d2d4e..467a18f 100644
    --- a/kernel/sys.c
    +++ b/kernel/sys.c
    @@ -116,20 +116,6 @@ EXPORT_SYMBOL(fs_overflowuid);
    EXPORT_SYMBOL(fs_overflowgid);

    /*
    - * this indicates whether you can reboot with ctrl-alt-del: the default is yes
    - */
    -
    -int C_A_D = 1;
    -struct pid *cad_pid;
    -EXPORT_SYMBOL(cad_pid);
    -
    -/*
    - * If set, this is used for preparing the system to power off.
    - */
    -
    -void (*pm_power_off_prepare)(void);
    -
    -/*
    * Returns true if current's euid is same as p's uid or euid,
    * or has CAP_SYS_NICE to p's user_ns.
    *
    @@ -308,261 +294,6 @@ out_unlock:
    return retval;
    }

    -/**
    - * emergency_restart - reboot the system
    - *
    - * Without shutting down any hardware or taking any locks
    - * reboot the system. This is called when we know we are in
    - * trouble so this is our best effort to reboot. This is
    - * safe to call in interrupt context.
    - */
    -void emergency_restart(void)
    -{
    - kmsg_dump(KMSG_DUMP_EMERG);
    - machine_emergency_restart();
    -}
    -EXPORT_SYMBOL_GPL(emergency_restart);
    -
    -void kernel_restart_prepare(char *cmd)
    -{
    - blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
    - system_state = SYSTEM_RESTART;
    - usermodehelper_disable();
    - device_shutdown();
    -}
    -
    -/**
    - * register_reboot_notifier - Register function to be called at reboot time
    - * @nb: Info about notifier function to be called
    - *
    - * Registers a function with the list of functions
    - * to be called at reboot time.
    - *
    - * Currently always returns zero, as blocking_notifier_chain_register()
    - * always returns zero.
    - */
    -int register_reboot_notifier(struct notifier_block *nb)
    -{
    - return blocking_notifier_chain_register(&reboot_notifier_list, nb);
    -}
    -EXPORT_SYMBOL(register_reboot_notifier);
    -
    -/**
    - * unregister_reboot_notifier - Unregister previously registered reboot notifier
    - * @nb: Hook to be unregistered
    - *
    - * Unregisters a previously registered reboot
    - * notifier function.
    - *
    - * Returns zero on success, or %-ENOENT on failure.
    - */
    -int unregister_reboot_notifier(struct notifier_block *nb)
    -{
    - return blocking_notifier_chain_unregister(&reboot_notifier_list, nb);
    -}
    -EXPORT_SYMBOL(unregister_reboot_notifier);
    -
    -static void migrate_to_reboot_cpu(void)
    -{
    - /* The boot cpu is always logical cpu 0 */
    - int reboot_cpu = 0;
    -
    - cpu_hotplug_disable();
    -
    - /* Make certain the cpu I'm about to reboot on is online */
    - if (!cpu_online(reboot_cpu))
    - reboot_cpu = cpumask_first(cpu_online_mask);
    -
    - /* Prevent races with other tasks migrating this task */
    - current->flags |= PF_NO_SETAFFINITY;
    -
    - /* Make certain I only run on the appropriate processor */
    - set_cpus_allowed_ptr(current, cpumask_of(reboot_cpu));
    -}
    -
    -/**
    - * kernel_restart - reboot the system
    - * @cmd: pointer to buffer containing command to execute for restart
    - * or %NULL
    - *
    - * Shutdown everything and perform a clean reboot.
    - * This is not safe to call in interrupt context.
    - */
    -void kernel_restart(char *cmd)
    -{
    - kernel_restart_prepare(cmd);
    - migrate_to_reboot_cpu();
    - syscore_shutdown();
    - if (!cmd)
    - printk(KERN_EMERG "Restarting system.\n");
    - else
    - printk(KERN_EMERG "Restarting system with command '%s'.\n", cmd);
    - kmsg_dump(KMSG_DUMP_RESTART);
    - machine_restart(cmd);
    -}
    -EXPORT_SYMBOL_GPL(kernel_restart);
    -
    -static void kernel_shutdown_prepare(enum system_states state)
    -{
    - blocking_notifier_call_chain(&reboot_notifier_list,
    - (state == SYSTEM_HALT)?SYS_HALT:SYS_POWER_OFF, NULL);
    - system_state = state;
    - usermodehelper_disable();
    - device_shutdown();
    -}
    -/**
    - * kernel_halt - halt the system
    - *
    - * Shutdown everything and perform a clean system halt.
    - */
    -void kernel_halt(void)
    -{
    - kernel_shutdown_prepare(SYSTEM_HALT);
    - migrate_to_reboot_cpu();
    - syscore_shutdown();
    - printk(KERN_EMERG "System halted.\n");
    - kmsg_dump(KMSG_DUMP_HALT);
    - machine_halt();
    -}
    -
    -EXPORT_SYMBOL_GPL(kernel_halt);
    -
    -/**
    - * kernel_power_off - power_off the system
    - *
    - * Shutdown everything and perform a clean system power_off.
    - */
    -void kernel_power_off(void)
    -{
    - kernel_shutdown_prepare(SYSTEM_POWER_OFF);
    - if (pm_power_off_prepare)
    - pm_power_off_prepare();
    - migrate_to_reboot_cpu();
    - syscore_shutdown();
    - printk(KERN_EMERG "Power down.\n");
    - kmsg_dump(KMSG_DUMP_POWEROFF);
    - machine_power_off();
    -}
    -EXPORT_SYMBOL_GPL(kernel_power_off);
    -
    -static DEFINE_MUTEX(reboot_mutex);
    -
    -/*
    - * Reboot system call: for obvious reasons only root may call it,
    - * and even root needs to set up some magic numbers in the registers
    - * so that some mistake won't make this reboot the whole machine.
    - * You can also set the meaning of the ctrl-alt-del-key here.
    - *
    - * reboot doesn't sync: do that yourself before calling this.
    - */
    -SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
    - void __user *, arg)
    -{
    - struct pid_namespace *pid_ns = task_active_pid_ns(current);
    - char buffer[256];
    - int ret = 0;
    -
    - /* We only trust the superuser with rebooting the system. */
    - if (!ns_capable(pid_ns->user_ns, CAP_SYS_BOOT))
    - return -EPERM;
    -
    - /* For safety, we require "magic" arguments. */
    - if (magic1 != LINUX_REBOOT_MAGIC1 ||
    - (magic2 != LINUX_REBOOT_MAGIC2 &&
    - magic2 != LINUX_REBOOT_MAGIC2A &&
    - magic2 != LINUX_REBOOT_MAGIC2B &&
    - magic2 != LINUX_REBOOT_MAGIC2C))
    - return -EINVAL;
    -
    - /*
    - * If pid namespaces are enabled and the current task is in a child
    - * pid_namespace, the command is handled by reboot_pid_ns() which will
    - * call do_exit().
    - */
    - ret = reboot_pid_ns(pid_ns, cmd);
    - if (ret)
    - return ret;
    -
    - /* Instead of trying to make the power_off code look like
    - * halt when pm_power_off is not set do it the easy way.
    - */
    - if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
    - cmd = LINUX_REBOOT_CMD_HALT;
    -
    - mutex_lock(&reboot_mutex);
    - switch (cmd) {
    - case LINUX_REBOOT_CMD_RESTART:
    - kernel_restart(NULL);
    - break;
    -
    - case LINUX_REBOOT_CMD_CAD_ON:
    - C_A_D = 1;
    - break;
    -
    - case LINUX_REBOOT_CMD_CAD_OFF:
    - C_A_D = 0;
    - break;
    -
    - case LINUX_REBOOT_CMD_HALT:
    - kernel_halt();
    - do_exit(0);
    - panic("cannot halt");
    -
    - case LINUX_REBOOT_CMD_POWER_OFF:
    - kernel_power_off();
    - do_exit(0);
    - break;
    -
    - case LINUX_REBOOT_CMD_RESTART2:
    - if (strncpy_from_user(&buffer[0], arg, sizeof(buffer) - 1) < 0) {
    - ret = -EFAULT;
    - break;
    - }
    - buffer[sizeof(buffer) - 1] = '\0';
    -
    - kernel_restart(buffer);
    - break;
    -
    -#ifdef CONFIG_KEXEC
    - case LINUX_REBOOT_CMD_KEXEC:
    - ret = kernel_kexec();
    - break;
    -#endif
    -
    -#ifdef CONFIG_HIBERNATION
    - case LINUX_REBOOT_CMD_SW_SUSPEND:
    - ret = hibernate();
    - break;
    -#endif
    -
    - default:
    - ret = -EINVAL;
    - break;
    - }
    - mutex_unlock(&reboot_mutex);
    - return ret;
    -}
    -
    -static void deferred_cad(struct work_struct *dummy)
    -{
    - kernel_restart(NULL);
    -}
    -
    -/*
    - * This function gets called by ctrl-alt-del - ie the keyboard interrupt.
    - * As it's called within an interrupt, it may NOT sync: the only choice
    - * is whether to reboot at once, or just ignore the ctrl-alt-del.
    - */
    -void ctrl_alt_del(void)
    -{
    - static DECLARE_WORK(cad_work, deferred_cad);
    -
    - if (C_A_D)
    - schedule_work(&cad_work);
    - else
    - kill_cad_pid(SIGINT, 1);
    -}
    -
    /*
    * Unprivileged users may change the real gid to the effective gid
    * or vice versa. (BSD-style)
    @@ -2276,68 +2007,6 @@ SYSCALL_DEFINE3(getcpu, unsigned __user *, cpup, unsigned __user *, nodep,
    return err ? -EFAULT : 0;
    }

    -char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
    -
    -static int __orderly_poweroff(bool force)
    -{
    - char **argv;
    - static char *envp[] = {
    - "HOME=/",
    - "PATH=/sbin:/bin:/usr/sbin:/usr/bin",
    - NULL
    - };
    - int ret;
    -
    - argv = argv_split(GFP_KERNEL, poweroff_cmd, NULL);
    - if (argv) {
    - ret = call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
    - argv_free(argv);
    - } else {
    - printk(KERN_WARNING "%s failed to allocate memory for \"%s\"\n",
    - __func__, poweroff_cmd);
    - ret = -ENOMEM;
    - }
    -
    - if (ret && force) {
    - printk(KERN_WARNING "Failed to start orderly shutdown: "
    - "forcing the issue\n");
    - /*
    - * I guess this should try to kick off some daemon to sync and
    - * poweroff asap. Or not even bother syncing if we're doing an
    - * emergency shutdown?
    - */
    - emergency_sync();
    - kernel_power_off();
    - }
    -
    - return ret;
    -}
    -
    -static bool poweroff_force;
    -
    -static void poweroff_work_func(struct work_struct *work)
    -{
    - __orderly_poweroff(poweroff_force);
    -}
    -
    -static DECLARE_WORK(poweroff_work, poweroff_work_func);
    -
    -/**
    - * orderly_poweroff - Trigger an orderly system poweroff
    - * @force: force poweroff if command execution fails
    - *
    - * This may be called from any context to trigger a system shutdown.
    - * If the orderly shutdown fails, it will force an immediate shutdown.
    - */
    -int orderly_poweroff(bool force)
    -{
    - if (force) /* do not override the pending "true" */
    - poweroff_force = true;
    - schedule_work(&poweroff_work);
    - return 0;
    -}
    -EXPORT_SYMBOL_GPL(orderly_poweroff);
    -
    /**
    * do_sysinfo - fill in sysinfo struct
    * @info: pointer to buffer to fill
    --
    1.8.2.1


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