1 #ifndef _LINUX_IRQ_WORK_H
2 #define _LINUX_IRQ_WORK_H
4 #include <linux/llist.h>
7 * An entry can be in one of four states:
9 * free NULL, 0 -> {claimed} : free to be used
10 * claimed NULL, 3 -> {pending} : claimed to be enqueued
11 * pending next, 3 -> {busy} : queued, pending callback
12 * busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed
15 #define IRQ_WORK_PENDING 1UL
16 #define IRQ_WORK_BUSY 2UL
17 #define IRQ_WORK_FLAGS 3UL
18 #define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */
22 struct llist_node llnode;
23 void (*func)(struct irq_work *);
27 void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
33 #define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
35 bool irq_work_queue(struct irq_work *work);
38 bool irq_work_queue_on(struct irq_work *work, int cpu);
41 void irq_work_tick(void);
42 void irq_work_sync(struct irq_work *work);
44 #ifdef CONFIG_IRQ_WORK
45 #include <asm/irq_work.h>
47 void irq_work_run(void);
48 bool irq_work_needs_cpu(void);
50 static inline bool irq_work_needs_cpu(void) { return false; }
51 static inline void irq_work_run(void) { }
54 #endif /* _LINUX_IRQ_WORK_H */