From d340ebd696f921d3ad01b8c0c29dd38f2ad2bf3e Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 6 Jun 2018 14:46:59 +0200
Subject: [PATCH] genirq/migration: Avoid out of line call if pending is not
set
The upcoming fix for the -EBUSY return from affinity settings requires to
use the irq_move_irq() functionality even on irq remapped interrupts. To
avoid the out of line call, move the check for the pending bit into an
inline helper.
Preparatory change for the real fix. No functional change.
Fixes: dccfe3147b42 ("x86/vector: Simplify vector move cleanup")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <liu.song.a23@gmail.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: stable@vger.kernel.org
Cc: Mike Travis <mike.travis@hpe.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Tariq Toukan <tariqt@mellanox.com>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Link: https://lkml.kernel.org/r/20180604162224.471925894@linutronix.de
---
include/linux/irq.h | 7 ++++++-
kernel/irq/migration.c | 5 +----
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 65916a305f3dd..4e66378f290b5 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -551,7 +551,12 @@ extern int irq_affinity_online_cpu(unsigned int cpu);
#endif
#if defined(CONFIG_SMP) && defined(CONFIG_GENERIC_PENDING_IRQ)
-void irq_move_irq(struct irq_data *data);
+void __irq_move_irq(struct irq_data *data);
+static inline void irq_move_irq(struct irq_data *data)
+{
+ if (unlikely(irqd_is_setaffinity_pending(data)))
+ __irq_move_irq(data);
+}
void irq_move_masked_irq(struct irq_data *data);
void irq_force_complete_move(struct irq_desc *desc);
#else
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 8b8cecd18cce1..def48589ea484 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -91,7 +91,7 @@ void irq_move_masked_irq(struct irq_data *idata)
cpumask_clear(desc->pending_mask);
}
-void irq_move_irq(struct irq_data *idata)
+void __irq_move_irq(struct irq_data *idata)
{
bool masked;
@@ -102,9 +102,6 @@ void irq_move_irq(struct irq_data *idata)
*/
idata = irq_desc_get_irq_data(irq_data_to_desc(idata));
- if (likely(!irqd_is_setaffinity_pending(idata)))
- return;
-
if (unlikely(irqd_irq_disabled(idata)))
return;
--
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