forked from mirrors/linux
64bac5ea17
The prototype was hidden in an #ifdef on x86, which causes a warning: kernel/irq_work.c:72:13: error: no previous prototype for 'arch_irq_work_raise' [-Werror=missing-prototypes] Some architectures have a working prototype, while others don't. Fix this by providing it in only one place that is always visible. Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com> Acked-by: Guo Ren <guoren@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
78 lines
2 KiB
C
78 lines
2 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/smp_types.h>
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#include <linux/rcuwait.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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struct irq_work {
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struct __call_single_node node;
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void (*func)(struct irq_work *);
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struct rcuwait irqwait;
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};
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#define __IRQ_WORK_INIT(_func, _flags) (struct irq_work){ \
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.node = { .u_flags = (_flags), }, \
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.func = (_func), \
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.irqwait = __RCUWAIT_INITIALIZER(irqwait), \
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}
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#define IRQ_WORK_INIT(_func) __IRQ_WORK_INIT(_func, 0)
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#define IRQ_WORK_INIT_LAZY(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_LAZY)
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#define IRQ_WORK_INIT_HARD(_func) __IRQ_WORK_INIT(_func, IRQ_WORK_HARD_IRQ)
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#define DEFINE_IRQ_WORK(name, _f) \
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struct irq_work name = IRQ_WORK_INIT(_f)
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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 = IRQ_WORK_INIT(func);
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}
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static inline bool irq_work_is_pending(struct irq_work *work)
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{
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return atomic_read(&work->node.a_flags) & IRQ_WORK_PENDING;
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}
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static inline bool irq_work_is_busy(struct irq_work *work)
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{
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return atomic_read(&work->node.a_flags) & IRQ_WORK_BUSY;
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}
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static inline bool irq_work_is_hard(struct irq_work *work)
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{
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return atomic_read(&work->node.a_flags) & IRQ_WORK_HARD_IRQ;
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}
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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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void irq_work_single(void *arg);
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void arch_irq_work_raise(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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static inline void irq_work_single(void *arg) { }
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#endif
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#endif /* _LINUX_IRQ_WORK_H */
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