1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_IRQ_WORK_H
3 #define _LINUX_IRQ_WORK_H
5 #include <linux/smp_types.h>
8 * An entry can be in one of four states:
10 * free NULL, 0 -> {claimed} : free to be used
11 * claimed NULL, 3 -> {pending} : claimed to be enqueued
12 * pending next, 3 -> {busy} : queued, pending callback
13 * busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed
18 struct __call_single_node node;
20 struct llist_node llnode;
24 void (*func)(struct irq_work *);
28 void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
30 atomic_set(&work->flags, 0);
34 #define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { \
35 .flags = ATOMIC_INIT(0), \
40 bool irq_work_queue(struct irq_work *work);
41 bool irq_work_queue_on(struct irq_work *work, int cpu);
43 void irq_work_tick(void);
44 void irq_work_sync(struct irq_work *work);
46 #ifdef CONFIG_IRQ_WORK
47 #include <asm/irq_work.h>
49 void irq_work_run(void);
50 bool irq_work_needs_cpu(void);
51 void irq_work_single(void *arg);
53 static inline bool irq_work_needs_cpu(void) { return false; }
54 static inline void irq_work_run(void) { }
55 static inline void irq_work_single(void *arg) { }
58 #endif /* _LINUX_IRQ_WORK_H */