linux-kernel - [PATCH 5/5] irqchip: Constify some irq_data_get_irq

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Message-ID: <98dd8f88c7dd11474925b65b6bd6e34f1be7198f.1731835733.git.christophe.jaillet@wanadoo.fr>
Date: Sun, 17 Nov 2024 10:49:47 +0100
From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
To: tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH 5/5] irqchip: Constify some irq_data_get_irq_chip() usage

When irq_data_get_irq_chip() will return a const struct irq_chip, the const
qualifier will be needed for local variables that store the return value of
this function.

So start to add some of these const qualifiers.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
Compile tested only
---
 kernel/irq/chip.c       |  4 ++--
 kernel/irq/cpuhotplug.c |  2 +-
 kernel/irq/manage.c     | 12 ++++++------
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index d3acccf7e2e2..2d540884ca05 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1145,7 +1145,7 @@ EXPORT_SYMBOL_GPL(irq_modify_status);
 void irq_cpu_online(void)
 {
 	struct irq_desc *desc;
-	struct irq_chip *chip;
+	const struct irq_chip *chip;
 	unsigned long flags;
 	unsigned int irq;
 
@@ -1175,7 +1175,7 @@ void irq_cpu_online(void)
 void irq_cpu_offline(void)
 {
 	struct irq_desc *desc;
-	struct irq_chip *chip;
+	const struct irq_chip *chip;
 	unsigned long flags;
 	unsigned int irq;
 
diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
index 15a7654eff68..dbfa7d63438f 100644
--- a/kernel/irq/cpuhotplug.c
+++ b/kernel/irq/cpuhotplug.c
@@ -53,7 +53,7 @@ static inline bool irq_needs_fixup(struct irq_data *d)
 static bool migrate_one_irq(struct irq_desc *desc)
 {
 	struct irq_data *d = irq_desc_get_irq_data(desc);
-	struct irq_chip *chip = irq_data_get_irq_chip(d);
+	const struct irq_chip *chip = irq_data_get_irq_chip(d);
 	bool maskchip = !irq_can_move_pcntxt(d) && !irqd_irq_masked(d);
 	const struct cpumask *affinity;
 	bool brokeaff = false;
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index e7f548bc976b..dfe184218cc2 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -207,7 +207,7 @@ void irq_set_thread_affinity(struct irq_desc *desc)
 static void irq_validate_effective_affinity(struct irq_data *data)
 {
 	const struct cpumask *m = irq_data_get_effective_affinity_mask(data);
-	struct irq_chip *chip = irq_data_get_irq_chip(data);
+	const struct irq_chip *chip = irq_data_get_irq_chip(data);
 
 	if (!cpumask_empty(m))
 		return;
@@ -225,7 +225,7 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
 {
 	struct cpumask *tmp_mask = this_cpu_ptr(&__tmp_mask);
 	struct irq_desc *desc = irq_data_to_desc(data);
-	struct irq_chip *chip = irq_data_get_irq_chip(data);
+	const struct irq_chip *chip = irq_data_get_irq_chip(data);
 	const struct cpumask  *prog_mask;
 	int ret;
 
@@ -353,7 +353,7 @@ static bool irq_set_affinity_deactivated(struct irq_data *data,
 int irq_set_affinity_locked(struct irq_data *data, const struct cpumask *mask,
 			    bool force)
 {
-	struct irq_chip *chip = irq_data_get_irq_chip(data);
+	const struct irq_chip *chip = irq_data_get_irq_chip(data);
 	struct irq_desc *desc = irq_data_to_desc(data);
 	int ret = 0;
 
@@ -658,7 +658,7 @@ int irq_set_vcpu_affinity(unsigned int irq, void *vcpu_info)
 	unsigned long flags;
 	struct irq_desc *desc = irq_get_desc_lock(irq, &flags, 0);
 	struct irq_data *data;
-	struct irq_chip *chip;
+	const struct irq_chip *chip;
 	int ret = -ENOSYS;
 
 	if (!desc)
@@ -2799,7 +2799,7 @@ void teardown_percpu_nmi(unsigned int irq)
 int __irq_get_irqchip_state(struct irq_data *data, enum irqchip_irq_state which,
 			    bool *state)
 {
-	struct irq_chip *chip;
+	const struct irq_chip *chip;
 	int err = -EINVAL;
 
 	do {
@@ -2871,7 +2871,7 @@ int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which,
 {
 	struct irq_desc *desc;
 	struct irq_data *data;
-	struct irq_chip *chip;
+	const struct irq_chip *chip;
 	unsigned long flags;
 	int err = -EINVAL;
 
-- 
2.47.0