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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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
/*
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* poweroff.c - sysrq handler to gracefully power down machine.
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*
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* This file is released under the GPL v2
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*/
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#include <linux/kernel.h>
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#include <linux/sysrq.h>
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#include <linux/init.h>
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#include <linux/pm.h>
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#include <linux/workqueue.h>
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#include <linux/reboot.h>
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#include <linux/cpumask.h>
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/*
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* When the user hits Sys-Rq o to power down the machine this is the
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* callback we use.
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*/
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static void do_poweroff(struct work_struct *dummy)
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{
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kernel_power_off();
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}
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static DECLARE_WORK(poweroff_work, do_poweroff);
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static void handle_poweroff(int key)
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{
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/* run sysrq poweroff on boot cpu */
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schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
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}
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static struct sysrq_key_op sysrq_poweroff_op = {
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.handler = handle_poweroff,
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.help_msg = "poweroff(o)",
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.action_msg = "Power Off",
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.enable_mask = SYSRQ_ENABLE_BOOT,
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};
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static int __init pm_sysrq_init(void)
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{
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register_sysrq_key('o', &sysrq_poweroff_op);
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return 0;
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}
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subsys_initcall(pm_sysrq_init);
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