genirq/generic_chip: Constify irq_generic_chip_ops

rikardfalkeborn · KAGA-KOKO · commit 4946f15e8c33 · 2021-12-01T00:15:07.000+01:00
The only usage of irq_generic_chip_ops is to pass its address to irq_domain_add_linear() which takes a pointer to const struct irq_domain_ops. Make it const to allow the compiler to put it in read-only memory. [ tglx: Fixed subject prefix ] Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20211130214043.1257585-1-rikard.falkeborn@gmail.com
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
@@ -131,7 +131,7 @@ struct irq_domain_ops {
 #endif
 };
 
-extern struct irq_domain_ops irq_generic_chip_ops;
+extern const struct irq_domain_ops irq_generic_chip_ops;
 
 struct irq_domain_chip_generic;
 
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
@@ -451,7 +451,7 @@ static void irq_unmap_generic_chip(struct irq_domain *d, unsigned int virq)
 
 }
 
-struct irq_domain_ops irq_generic_chip_ops = {
+const struct irq_domain_ops irq_generic_chip_ops = {
 	.map	= irq_map_generic_chip,
 	.unmap  = irq_unmap_generic_chip,
 	.xlate	= irq_domain_xlate_onetwocell,

Original file line number	Diff line number	Diff line change
`@@ -451,7 +451,7 @@ static void irq_unmap_generic_chip(struct irq_domain *d, unsigned int virq)`
`451`	`451`
`452`	`452`	`}`
`453`	`453`
`454`		`-struct irq_domain_ops irq_generic_chip_ops = {`
	`454`	`+const struct irq_domain_ops irq_generic_chip_ops = {`
`455`	`455`	`.map = irq_map_generic_chip,`
`456`	`456`	`.unmap = irq_unmap_generic_chip,`
`457`	`457`	`.xlate = irq_domain_xlate_onetwocell,`