mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 22:21:40 +00:00
28ad585e35
Currently help message of /proc/sysrq-trigger highlight its
upper-case characters, like below:
SysRq : HELP : loglevel(0-9) reBoot Crash terminate-all-tasks(E)
memory-full-oom-kill(F) kill-all-tasks(I) ...
this would confuse user trigger sysrq by upper-case character, which is
inconsistent with the real lower-case character registed key.
This inconsistent help message will also lead more confused when
26 upper-case letters put into use in future.
This patch fix power off sysrq key: "poweroff(o)"
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
47 lines
990 B
C
47 lines
990 B
C
/*
|
|
* poweroff.c - sysrq handler to gracefully power down machine.
|
|
*
|
|
* This file is released under the GPL v2
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/sysrq.h>
|
|
#include <linux/init.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/reboot.h>
|
|
#include <linux/cpumask.h>
|
|
|
|
/*
|
|
* When the user hits Sys-Rq o to power down the machine this is the
|
|
* callback we use.
|
|
*/
|
|
|
|
static void do_poweroff(struct work_struct *dummy)
|
|
{
|
|
kernel_power_off();
|
|
}
|
|
|
|
static DECLARE_WORK(poweroff_work, do_poweroff);
|
|
|
|
static void handle_poweroff(int key)
|
|
{
|
|
/* run sysrq poweroff on boot cpu */
|
|
schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
|
|
}
|
|
|
|
static struct sysrq_key_op sysrq_poweroff_op = {
|
|
.handler = handle_poweroff,
|
|
.help_msg = "poweroff(o)",
|
|
.action_msg = "Power Off",
|
|
.enable_mask = SYSRQ_ENABLE_BOOT,
|
|
};
|
|
|
|
static int __init pm_sysrq_init(void)
|
|
{
|
|
register_sysrq_key('o', &sysrq_poweroff_op);
|
|
return 0;
|
|
}
|
|
|
|
subsys_initcall(pm_sysrq_init);
|