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| author | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-08-18 19:59:16 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2017-10-09 23:24:14 +0200 |
| commit | 6733bab7bc09b67668028dab562caea1b4ff3c69 (patch) | |
| tree | a35a59d78803e1c153017b1635d5a8e558344cde | |
| parent | rcu: Create call_rcu_tasks() kthread at boot time (diff) | |
| download | linux-6733bab7bc09b67668028dab562caea1b4ff3c69.tar.xz linux-6733bab7bc09b67668028dab562caea1b4ff3c69.zip | |
irq_work: Map irq_work_on_queue() to irq_work_on() in !SMP
Commit 478850160636 ("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>
| -rw-r--r-- | include/linux/irq_work.h | 3 | ||||
| -rw-r--r-- | kernel/irq_work.c | 9 |
2 files changed, 6 insertions, 6 deletions
diff --git a/include/linux/irq_work.h b/include/linux/irq_work.h index 47b9ebd4a74f..d8c9876d5da4 100644 --- a/include/linux/irq_work.h +++ b/include/linux/irq_work.h @@ -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); diff --git a/kernel/irq_work.c b/kernel/irq_work.c index bcf107ce0854..9f20f6c72579 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -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) |