mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-13 22:25:03 +00:00
f39650de68
kernel.h is being used as a dump for all kinds of stuff for a long time. Here is the attempt to start cleaning it up by splitting out panic and oops helpers. There are several purposes of doing this: - dropping dependency in bug.h - dropping a loop by moving out panic_notifier.h - unload kernel.h from something which has its own domain At the same time convert users tree-wide to use new headers, although for the time being include new header back to kernel.h to avoid twisted indirected includes for existing users. [akpm@linux-foundation.org: thread_info.h needs limits.h] [andriy.shevchenko@linux.intel.com: ia64 fix] Link: https://lkml.kernel.org/r/20210520130557.55277-1-andriy.shevchenko@linux.intel.com Link: https://lkml.kernel.org/r/20210511074137.33666-1-andriy.shevchenko@linux.intel.com Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Co-developed-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Corey Minyard <cminyard@mvista.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Kees Cook <keescook@chromium.org> Acked-by: Wei Liu <wei.liu@kernel.org> Acked-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Sebastian Reichel <sre@kernel.org> Acked-by: Luis Chamberlain <mcgrof@kernel.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Acked-by: Helge Deller <deller@gmx.de> # parisc Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Kernel Panic LED Trigger
|
|
*
|
|
* Copyright 2016 Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/panic_notifier.h>
|
|
#include <linux/leds.h>
|
|
#include "../leds.h"
|
|
|
|
static struct led_trigger *trigger;
|
|
|
|
/*
|
|
* This is called in a special context by the atomic panic
|
|
* notifier. This means the trigger can be changed without
|
|
* worrying about locking.
|
|
*/
|
|
static void led_trigger_set_panic(struct led_classdev *led_cdev)
|
|
{
|
|
struct led_trigger *trig;
|
|
|
|
list_for_each_entry(trig, &trigger_list, next_trig) {
|
|
if (strcmp("panic", trig->name))
|
|
continue;
|
|
if (led_cdev->trigger)
|
|
list_del(&led_cdev->trig_list);
|
|
list_add_tail(&led_cdev->trig_list, &trig->led_cdevs);
|
|
|
|
/* Avoid the delayed blink path */
|
|
led_cdev->blink_delay_on = 0;
|
|
led_cdev->blink_delay_off = 0;
|
|
|
|
led_cdev->trigger = trig;
|
|
if (trig->activate)
|
|
trig->activate(led_cdev);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int led_trigger_panic_notifier(struct notifier_block *nb,
|
|
unsigned long code, void *unused)
|
|
{
|
|
struct led_classdev *led_cdev;
|
|
|
|
list_for_each_entry(led_cdev, &leds_list, node)
|
|
if (led_cdev->flags & LED_PANIC_INDICATOR)
|
|
led_trigger_set_panic(led_cdev);
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block led_trigger_panic_nb = {
|
|
.notifier_call = led_trigger_panic_notifier,
|
|
};
|
|
|
|
static long led_panic_blink(int state)
|
|
{
|
|
led_trigger_event(trigger, state ? LED_FULL : LED_OFF);
|
|
return 0;
|
|
}
|
|
|
|
static int __init ledtrig_panic_init(void)
|
|
{
|
|
atomic_notifier_chain_register(&panic_notifier_list,
|
|
&led_trigger_panic_nb);
|
|
|
|
led_trigger_register_simple("panic", &trigger);
|
|
panic_blink = led_panic_blink;
|
|
return 0;
|
|
}
|
|
device_initcall(ledtrig_panic_init);
|