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irq_domain: constify irq_domain_ops

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Make irq_domain_ops pointer a constant to make it safer for multiple
instances to share the same ops pointer and change the irq_domain code
so that it does not modify the ops.

v4: Fix mismatched type reference in powerpc code

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Milton Miller <miltonm@bga.com>
Tested-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Grant Likely 2012-01-26 12:12:14 -07:00
parent 16b2e6e2f3
commit a18dc81bf5
3 changed files with 23 additions and 24 deletions
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14
include/linux/irqdomain.h
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@ -106,7 +106,7 @@ struct irq_domain {
} linear;
struct radix_tree_root tree;
} revmap_data;
struct irq_domain_ops *ops;
const struct irq_domain_ops *ops;
void *host_data;
irq_hw_number_t inval_irq;
@ -119,17 +119,17 @@ struct irq_domain *irq_domain_add_legacy(struct device_node *of_node,
unsigned int size,
unsigned int first_irq,
irq_hw_number_t first_hwirq,
struct irq_domain_ops *ops,
const struct irq_domain_ops *ops,
void *host_data);
struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
unsigned int size,
struct irq_domain_ops *ops,
const struct irq_domain_ops *ops,
void *host_data);
struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
struct irq_domain_ops *ops,
const struct irq_domain_ops *ops,
void *host_data);
struct irq_domain *irq_domain_add_tree(struct device_node *of_node,
struct irq_domain_ops *ops,
const struct irq_domain_ops *ops,
void *host_data);
extern struct irq_domain *irq_find_host(struct device_node *node);
@ -138,7 +138,7 @@ extern void irq_set_virq_count(unsigned int count);
static inline struct irq_domain *irq_domain_add_legacy_isa(
struct device_node *of_node,
struct irq_domain_ops *ops,
const struct irq_domain_ops *ops,
void *host_data)
{
return irq_domain_add_legacy(of_node, NUM_ISA_INTERRUPTS, 0, 0, ops,
@ -162,7 +162,7 @@ extern unsigned int irq_radix_revmap_lookup(struct irq_domain *host,
extern unsigned int irq_linear_revmap(struct irq_domain *host,
irq_hw_number_t hwirq);
extern struct irq_domain_ops irq_domain_simple_ops;
extern const struct irq_domain_ops irq_domain_simple_ops;
/* stock xlate functions */
int irq_domain_xlate_onecell(struct irq_domain *d, struct device_node *ctrlr,