077931446b
Conflicts: kernel/irq_work.c Add support for printk in full dynticks CPU. * Don't stop tick with irq works pending. This fix is generally useful and concerns archs that can't raise self IPIs. * Flush irq works before CPU offlining. * Introduce "lazy" irq works that can wait for the next tick to be executed, unless it's stopped. * Implement klogd wake up using irq work. This removes the ad-hoc printk_tick()/printk_needs_cpu() hooks and make it working even in dynticks mode. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
43 lines
1 KiB
C
43 lines
1 KiB
C
#ifndef _LINUX_IRQ_WORK_H
|
|
#define _LINUX_IRQ_WORK_H
|
|
|
|
#include <linux/llist.h>
|
|
|
|
/*
|
|
* 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 bool irq_work_needs_cpu(void) { return false; }
|
|
#endif
|
|
|
|
#endif /* _LINUX_IRQ_WORK_H */
|