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driver core: bus: constantify the bus_find_* functions

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All of the bus find and iterator functions do not modify the struct
bus_type passed to them, so mark them as constant to enforce this rule.

Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Link: https://lore.kernel.org/r/20230208111330.439504-4-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman 2023-02-08 12:13:12 +01:00
parent 273afac615
commit e0766ea4c8
2 changed files with 13 additions and 13 deletions
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6
drivers/base/bus.c
View File

@ -331,7 +331,7 @@ static struct device *next_device(struct klist_iter *i)
* to retain this data, it should do so, and increment the reference
* count in the supplied callback.
*/
int bus_for_each_dev(struct bus_type *bus, struct device *start,
int bus_for_each_dev(const struct bus_type *bus, struct device *start,
void *data, int (*fn)(struct device *, void *))
{
struct klist_iter i;
@ -365,7 +365,7 @@ EXPORT_SYMBOL_GPL(bus_for_each_dev);
* if it does. If the callback returns non-zero, this function will
* return to the caller and not iterate over any more devices.
*/
struct device *bus_find_device(struct bus_type *bus,
struct device *bus_find_device(const struct bus_type *bus,
struct device *start, const void *data,
int (*match)(struct device *dev, const void *data))
{
@ -416,7 +416,7 @@ static struct device_driver *next_driver(struct klist_iter *i)
* in the callback. It must also be sure to increment the refcount
* so it doesn't disappear before returning to the caller.
*/
int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
int bus_for_each_drv(const struct bus_type *bus, struct device_driver *start,
void *data, int (*fn)(struct device_driver *, void *))
{
struct klist_iter i;

20
include/linux/device/bus.h
View File

@ -149,9 +149,9 @@ int device_match_acpi_handle(struct device *dev, const void *handle);
int device_match_any(struct device *dev, const void *unused);
/* iterator helpers for buses */
int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
int bus_for_each_dev(const struct bus_type *bus, struct device *start, void *data,
int (*fn)(struct device *dev, void *data));
struct device *bus_find_device(struct bus_type *bus, struct device *start,
struct device *bus_find_device(const struct bus_type *bus, struct device *start,
const void *data,
int (*match)(struct device *dev, const void *data));
/**
@ -161,7 +161,7 @@ struct device *bus_find_device(struct bus_type *bus, struct device *start,
* @start: Device to begin with
* @name: name of the device to match
*/
static inline struct device *bus_find_device_by_name(struct bus_type *bus,
static inline struct device *bus_find_device_by_name(const struct bus_type *bus,
struct device *start,
const char *name)
{
@ -175,7 +175,7 @@ static inline struct device *bus_find_device_by_name(struct bus_type *bus,
* @np: of_node of the device to match.
*/
static inline struct device *
bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
bus_find_device_by_of_node(const struct bus_type *bus, const struct device_node *np)
{
return bus_find_device(bus, NULL, np, device_match_of_node);
}
@ -187,7 +187,7 @@ bus_find_device_by_of_node(struct bus_type *bus, const struct device_node *np)
* @fwnode: fwnode of the device to match.
*/
static inline struct device *
bus_find_device_by_fwnode(struct bus_type *bus, const struct fwnode_handle *fwnode)
bus_find_device_by_fwnode(const struct bus_type *bus, const struct fwnode_handle *fwnode)
{
return bus_find_device(bus, NULL, fwnode, device_match_fwnode);
}
@ -198,7 +198,7 @@ bus_find_device_by_fwnode(struct bus_type *bus, const struct fwnode_handle *fwno
* @bus: bus type
* @devt: device type of the device to match.
*/
static inline struct device *bus_find_device_by_devt(struct bus_type *bus,
static inline struct device *bus_find_device_by_devt(const struct bus_type *bus,
dev_t devt)
{
return bus_find_device(bus, NULL, &devt, device_match_devt);
@ -211,7 +211,7 @@ static inline struct device *bus_find_device_by_devt(struct bus_type *bus,
* @cur: device to begin the search with.
*/
static inline struct device *
bus_find_next_device(struct bus_type *bus,struct device *cur)
bus_find_next_device(const struct bus_type *bus,struct device *cur)
{
return bus_find_device(bus, cur, NULL, device_match_any);
}
@ -226,19 +226,19 @@ struct acpi_device;
* @adev: ACPI COMPANION device to match.
*/
static inline struct device *
bus_find_device_by_acpi_dev(struct bus_type *bus, const struct acpi_device *adev)
bus_find_device_by_acpi_dev(const struct bus_type *bus, const struct acpi_device *adev)
{
return bus_find_device(bus, NULL, adev, device_match_acpi_dev);
}
#else
static inline struct device *
bus_find_device_by_acpi_dev(struct bus_type *bus, const void *adev)
bus_find_device_by_acpi_dev(const struct bus_type *bus, const void *adev)
{
return NULL;
}
#endif
int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
int bus_for_each_drv(const struct bus_type *bus, struct device_driver *start,
void *data, int (*fn)(struct device_driver *, void *));
void bus_sort_breadthfirst(struct bus_type *bus,
int (*compare)(const struct device *a,