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1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_IRQ_WORK_H
3 #define _LINUX_IRQ_WORK_H
5 #include <linux/llist.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
16 #define IRQ_WORK_PENDING 1UL
17 #define IRQ_WORK_BUSY 2UL
18 #define IRQ_WORK_FLAGS 3UL
19 #define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */
23 struct llist_node llnode
;
24 void (*func
)(struct irq_work
*);
28 void init_irq_work(struct irq_work
*work
, void (*func
)(struct irq_work
*))
34 #define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
36 bool irq_work_queue(struct irq_work
*work
);
37 bool irq_work_queue_on(struct irq_work
*work
, int cpu
);
39 void irq_work_tick(void);
40 void irq_work_sync(struct irq_work
*work
);
42 #ifdef CONFIG_IRQ_WORK
43 #include <asm/irq_work.h>
45 void irq_work_run(void);
46 bool irq_work_needs_cpu(void);
48 static inline bool irq_work_needs_cpu(void) { return false; }
49 static inline void irq_work_run(void) { }
52 #endif /* _LINUX_IRQ_WORK_H */