linux-kernel - [PATCH 1/7] genirq/debugfs: Print percpu affinity for percpu

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Date:   Tue, 24 Apr 2018 15:36:12 +0100
From:   Marc Zyngier <marc.zyngier@....com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 1/7] genirq/debugfs: Print percpu affinity for percpu_devid interrupts

percpu_devid interrupts have their affinities stored in a different
field. Let's special-case it.

Signed-off-by: Marc Zyngier <marc.zyngier@....com>
---
 kernel/irq/debugfs.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/irq/debugfs.c b/kernel/irq/debugfs.c
index 4dadeb3d6666..da41150322e1 100644
--- a/kernel/irq/debugfs.c
+++ b/kernel/irq/debugfs.c
@@ -32,7 +32,10 @@ static void irq_debug_show_masks(struct seq_file *m, struct irq_desc *desc)
 	struct irq_data *data = irq_desc_get_irq_data(desc);
 	struct cpumask *msk;
 
-	msk = irq_data_get_affinity_mask(data);
+	if (irq_is_percpu_devid(data->irq))
+		msk = (struct cpumask *)desc->percpu_affinity;
+	else
+		msk = irq_data_get_affinity_mask(data);
 	seq_printf(m, "affinity: %*pbl\n", cpumask_pr_args(msk));
 #ifdef CONFIG_GENERIC_IRQ_EFFECTIVE_AFF_MASK
 	msk = irq_data_get_effective_affinity_mask(data);
-- 
2.14.2