linux-kernel - [PATCH 2/3] irqchip/gic: Correct declaration of *percpu_base pointer in union gic

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Message-ID: <20241213145809.2918-2-ubizjak@gmail.com>
Date: Fri, 13 Dec 2024 15:57:53 +0100
From: Uros Bizjak <ubizjak@...il.com>
To: linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Cc: Uros Bizjak <ubizjak@...il.com>,
	Marc Zyngier <maz@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 2/3] irqchip/gic: Correct declaration of *percpu_base pointer in union gic_base

percpu_base is used in various percpu functions that expect variable in
__percpu address space. Correct the declaration of percpu_base to

void __iomem * __percpu *percpu_base;

to declare the variable as __percpu pointer.

The patch fixes several sparse warnings:

irq-gic.c:1172:44: warning: incorrect type in assignment (different address spaces)
irq-gic.c:1172:44:    expected void [noderef] __percpu *[noderef] __iomem *percpu_base
irq-gic.c:1172:44:    got void [noderef] __iomem *[noderef] __percpu *
...
irq-gic.c:1184:26: warning: incorrect type in initializer (different address spaces)
irq-gic.c:1184:26:    expected void const [noderef] __percpu *__vpp_verify
irq-gic.c:1184:26:    got void [noderef] __percpu *[noderef] __iomem *
...
irq-gic.c:1184:71: warning: incorrect type in assignment (different address spaces)
irq-gic.c:1184:71:    expected void [noderef] __percpu *
irq-gic.c:1184:71:    got void [noderef] __iomem *
...
irq-gic.c:1231:43: warning: incorrect type in argument 1 (different address spaces)
irq-gic.c:1231:43:    expected void [noderef] __percpu *__pdata
irq-gic.c:1231:43:    got void [noderef] __percpu *[noderef] __iomem *percpu_base

There were no changes in the resulting object files.

Signed-off-by: Uros Bizjak <ubizjak@...il.com>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
---
 drivers/irqchip/irq-gic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 8fae6dc01024..6503573557fd 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -64,7 +64,7 @@ static void gic_check_cpu_features(void)

 union gic_base {
 	void __iomem *common_base;
-	void __percpu * __iomem *percpu_base;
+	void __iomem * __percpu *percpu_base;
 };

 struct gic_chip_data {
-- 
2.42.0