From d2e1446d81725c351dc73a03b397ce043fb18452 Mon Sep 17 00:00:00 2001 From: Meizu OpenSource Date: Mon, 15 Aug 2016 10:19:42 +0800 Subject: first commit --- include/linux/irq_work.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 include/linux/irq_work.h (limited to 'include/linux/irq_work.h') diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h new file mode 100644 index 000000000..66017028d --- /dev/null +++ b/include/linux/irq_work.h @@ -0,0 +1,43 @@ +#ifndef _LINUX_IRQ_WORK_H +#define _LINUX_IRQ_WORK_H + +#include + +/* + * An entry can be in one of four states: + * + * free NULL, 0 -> {claimed} : free to be used + * claimed NULL, 3 -> {pending} : claimed to be enqueued + * pending next, 3 -> {busy} : queued, pending callback + * busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed + */ + +#define IRQ_WORK_PENDING 1UL +#define IRQ_WORK_BUSY 2UL +#define IRQ_WORK_FLAGS 3UL +#define IRQ_WORK_LAZY 4UL /* Doesn't want IPI, wait for tick */ + +struct irq_work { + unsigned long flags; + struct llist_node llnode; + void (*func)(struct irq_work *); +}; + +static inline +void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *)) +{ + work->flags = 0; + work->func = func; +} + +void irq_work_queue(struct irq_work *work); +void irq_work_run(void); +void irq_work_sync(struct irq_work *work); + +#ifdef CONFIG_IRQ_WORK +bool irq_work_needs_cpu(void); +#else +static inline bool irq_work_needs_cpu(void) { return false; } +#endif + +#endif /* _LINUX_IRQ_WORK_H */ -- cgit v1.2.3