mirror of
https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-10.git
synced 2026-09-09 06:08:39 +08:00
Waiman Long
d67e737117
JIRA: https://issues.redhat.com/browse/RHEL-114122 Conflicts: Context diff in 3 hunks of kernel/time/alarmtimer.c due to the presence of a later upstream commit d82fadc72750 ("alarmtimer: Switch to use hrtimer_setup() and hrtimer_setup_on_stack()"). commit 2634303f8773b0c602069887565cd412440be15d Author: Thomas Gleixner <tglx@linutronix.de> Date: Tue, 5 Nov 2024 09:14:58 +0100 alarmtimers: Remove return value from alarm functions Now that the SIG_IGN problem is solved in the core code, the alarmtimer callbacks do not require a return value anymore. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/all/20241105064214.318837272@linutronix.de Signed-off-by: Waiman Long <longman@redhat.com>
65 lines
1.8 KiB
C
65 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_ALARMTIMER_H
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#define _LINUX_ALARMTIMER_H
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#include <linux/time.h>
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#include <linux/hrtimer.h>
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#include <linux/timerqueue.h>
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struct rtc_device;
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enum alarmtimer_type {
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ALARM_REALTIME,
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ALARM_BOOTTIME,
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/* Supported types end here */
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ALARM_NUMTYPE,
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/* Used for tracing information. No usable types. */
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ALARM_REALTIME_FREEZER,
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ALARM_BOOTTIME_FREEZER,
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};
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#define ALARMTIMER_STATE_INACTIVE 0x00
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#define ALARMTIMER_STATE_ENQUEUED 0x01
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/**
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* struct alarm - Alarm timer structure
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* @node: timerqueue node for adding to the event list this value
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* also includes the expiration time.
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* @timer: hrtimer used to schedule events while running
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* @function: Function pointer to be executed when the timer fires.
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* @type: Alarm type (BOOTTIME/REALTIME).
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* @state: Flag that represents if the alarm is set to fire or not.
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* @data: Internal data value.
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*/
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struct alarm {
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struct timerqueue_node node;
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struct hrtimer timer;
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void (*function)(struct alarm *, ktime_t now);
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enum alarmtimer_type type;
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int state;
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void *data;
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};
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void alarm_init(struct alarm *alarm, enum alarmtimer_type type,
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void (*function)(struct alarm *, ktime_t));
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void alarm_start(struct alarm *alarm, ktime_t start);
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void alarm_start_relative(struct alarm *alarm, ktime_t start);
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void alarm_restart(struct alarm *alarm);
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int alarm_try_to_cancel(struct alarm *alarm);
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int alarm_cancel(struct alarm *alarm);
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u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval);
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u64 alarm_forward_now(struct alarm *alarm, ktime_t interval);
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ktime_t alarm_expires_remaining(const struct alarm *alarm);
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#ifdef CONFIG_RTC_CLASS
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/* Provide way to access the rtc device being used by alarmtimers */
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struct rtc_device *alarmtimer_get_rtcdev(void);
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#else
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static inline struct rtc_device *alarmtimer_get_rtcdev(void) { return NULL; }
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#endif
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#endif
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