6baf9e67c9
IRQ_WORK_FLAGS is defined simply to 3UL. This is confusing as it says nothing about its purpose. Define IRQ_WORK_FLAGS as a bitwise OR of IRQ_WORK_PENDING and IRQ_WORK_BUSY and change its name to IRQ_WORK_CLAIMED. While we're at it: use the BIT() macro for all flags. Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl> Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1515125996-21564-1-git-send-email-frederic@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_IRQ_WORK_H
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#define _LINUX_IRQ_WORK_H
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#include <linux/llist.h>
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/*
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* An entry can be in one of four states:
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*
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* free NULL, 0 -> {claimed} : free to be used
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* claimed NULL, 3 -> {pending} : claimed to be enqueued
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* pending next, 3 -> {busy} : queued, pending callback
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* busy NULL, 2 -> {free, claimed} : callback in progress, can be claimed
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*/
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#define IRQ_WORK_PENDING BIT(0)
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#define IRQ_WORK_BUSY BIT(1)
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/* Doesn't want IPI, wait for tick: */
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#define IRQ_WORK_LAZY BIT(2)
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#define IRQ_WORK_CLAIMED (IRQ_WORK_PENDING | IRQ_WORK_BUSY)
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struct irq_work {
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unsigned long flags;
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struct llist_node llnode;
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void (*func)(struct irq_work *);
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};
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static inline
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void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
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{
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work->flags = 0;
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work->func = func;
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}
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#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
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bool irq_work_queue(struct irq_work *work);
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bool irq_work_queue_on(struct irq_work *work, int cpu);
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void irq_work_tick(void);
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void irq_work_sync(struct irq_work *work);
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#ifdef CONFIG_IRQ_WORK
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#include <asm/irq_work.h>
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void irq_work_run(void);
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bool irq_work_needs_cpu(void);
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#else
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static inline bool irq_work_needs_cpu(void) { return false; }
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static inline void irq_work_run(void) { }
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#endif
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#endif /* _LINUX_IRQ_WORK_H */
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