linux-kernel - [PATCH -next] genirq: Change can_request

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Message-ID: <20220914110615.3570933-1-chris.zjh@huawei.com>
Date:   Wed, 14 Sep 2022 19:06:15 +0800
From:   Zhang Jianhua <chris.zjh@...wei.com>
To:     <tglx@...utronix.de>, <maz@...nel.org>, <samuel@...lland.org>,
        <brgl@...ev.pl>, <mark.rutland@....com>, <lvjianmin@...ngson.cn>
CC:     <chris.zjh@...wei.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH -next] genirq: Change can_request_irq() return value type to bool

The function can_request_irq() is used to judge whether the irq can be
allocated, so bool type would be more suitable for it.

Signed-off-by: Zhang Jianhua <chris.zjh@...wei.com>
---
 include/linux/irq.h | 2 +-
 kernel/irq/manage.c | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index c3eb89606c2b..3a60c2313fb9 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -707,7 +707,7 @@ extern void note_interrupt(struct irq_desc *desc, irqreturn_t action_ret);
 extern int noirqdebug_setup(char *str);
 
 /* Checks whether the interrupt can be requested by request_irq(): */
-extern int can_request_irq(unsigned int irq, unsigned long irqflags);
+extern bool can_request_irq(unsigned int irq, unsigned long irqflags);
 
 /* Dummy irq-chip implementations: */
 extern struct irq_chip no_irq_chip;
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 40fe7806cc8c..d6940d15bf56 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -925,19 +925,19 @@ EXPORT_SYMBOL(irq_set_irq_wake);
  * particular irq has been exclusively allocated or is available
  * for driver use.
  */
-int can_request_irq(unsigned int irq, unsigned long irqflags)
+bool can_request_irq(unsigned int irq, unsigned long irqflags)
 {
 	unsigned long flags;
 	struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
-	int canrequest = 0;
+	bool canrequest = false;
 
 	if (!desc)
-		return 0;
+		return false;
 
 	if (irq_settings_can_request(desc)) {
 		if (!desc->action ||
 		    irqflags & desc->action->flags & IRQF_SHARED)
-			canrequest = 1;
+			canrequest = true;
 	}
 	irq_put_desc_unlock(desc, flags);
 	return canrequest;
-- 
2.31.0