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irq_work: Map irq_work_on_queue() to irq_work_on() in !SMP

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Commit 4788501606 ("irq_work: Implement remote queueing") provides
irq_work_on_queue() only for SMP builds.  However, providing it simplifies
code that submits irq_work to lists of CPUs, eliminating the !SMP special
cases.  This commit therefore maps irq_work_on_queue() to irq_work_on()
in !SMP builds, but validating the specified CPU.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
This commit is contained in:
Paul E. McKenney 2017-08-18 10:59:16 -07:00
parent c63eb17ff0
commit 6733bab7bc
2 changed files with 6 additions and 6 deletions
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3
include/linux/irq_work.h
View File

@ -33,10 +33,7 @@ void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))
#define DEFINE_IRQ_WORK(name, _f) struct irq_work name = { .func = (_f), }
bool irq_work_queue(struct irq_work *work);
#ifdef CONFIG_SMP
bool irq_work_queue_on(struct irq_work *work, int cpu);
#endif
void irq_work_tick(void);
void irq_work_sync(struct irq_work *work);

9
kernel/irq_work.c
View File

@ -56,7 +56,6 @@ void __weak arch_irq_work_raise(void)
*/
}
#ifdef CONFIG_SMP
/*
* Enqueue the irq_work @work on @cpu unless it's already pending
* somewhere.
@ -68,6 +67,8 @@ bool irq_work_queue_on(struct irq_work *work, int cpu)
/* All work should have been flushed before going offline */
WARN_ON_ONCE(cpu_is_offline(cpu));
#ifdef CONFIG_SMP
/* Arch remote IPI send/receive backend aren't NMI safe */
WARN_ON_ONCE(in_nmi());
@ -78,10 +79,12 @@ bool irq_work_queue_on(struct irq_work *work, int cpu)
if (llist_add(&work->llnode, &per_cpu(raised_list, cpu)))
arch_send_call_function_single_ipi(cpu);
#else /* #ifdef CONFIG_SMP */
irq_work_queue(work);
#endif /* #else #ifdef CONFIG_SMP */
return true;
}
EXPORT_SYMBOL_GPL(irq_work_queue_on);
#endif
/* Enqueue the irq work @work on the current CPU */
bool irq_work_queue(struct irq_work *work)