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authorPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-08-18 10:59:16 -0700
committerPaul E. McKenney <paulmck@linux.vnet.ibm.com>2017-10-09 14:24:14 -0700
commit6733bab7bc09b67668028dab562caea1b4ff3c69 (patch)
treea35a59d78803e1c153017b1635d5a8e558344cde /kernel/irq_work.c
parentc63eb17ff06dbcf73e771b9b425c531cc0a9c17b (diff)
downloadlinux-6733bab7bc09b67668028dab562caea1b4ff3c69.tar.bz2
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>
Diffstat (limited to 'kernel/irq_work.c')
-rw-r--r--kernel/irq_work.c9
1 files changed, 6 insertions, 3 deletions
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)