irq_work.h

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/*
 * DCL irq_work.h -- irq_work runs as a DCL work_struct, inline.
 *
 * dma-fence-chain.c raises an irq_work to signal the chain without taking
 * the fence lock in IRQ context; DCL has no IRQ-side queue, and
 * workqueue.h's schedule_work already runs the callback synchronously, so
 * queueing here behaves like mainline's "runs on next irq return" for our
 * single-threaded flow.
 */
#ifndef _LINUX_IRQ_WORK_H
#define _LINUX_IRQ_WORK_H
 
#include <linux/workqueue.h>
 
struct irq_work {
    struct work_struct base;
    void (*func)(struct irq_work *work);
};
 
static inline void dcl_irq_work_trampoline(struct work_struct *base)
{
    struct irq_work *work =
        (struct irq_work *)((char *)base - __builtin_offsetof(struct irq_work, base));
    work->func(work);
}
 
#define init_irq_work(work, fn)     do {        \
    (work)->func = (fn);                \
    INIT_WORK(&(work)->base, dcl_irq_work_trampoline);  \
} while (0)
 
static inline bool irq_work_queue(struct irq_work *work)
{
    return schedule_work(&work->base);
}
 
static inline void irq_work_sync(struct irq_work *work)
{
    flush_work(&work->base);
}
 
#endif /* _LINUX_IRQ_WORK_H */