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driver-core: constify data for class_find_device()

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All in-kernel users of class_find_device() don't really need mutable
data for match callback.

In two places (kernel/power/suspend_test.c, drivers/scsi/osd/osd_uld.c)
this patch changes match callbacks to use const search data.

The const is propagated to rtc_class_open() and power_supply_get_by_name()
parameters.

Note that there's a dev reference leak in suspend_test.c that's not
touched in this patch.

Signed-off-by: Michał Mirosław <[email protected]>
Acked-by: Grant Likely <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Michał Mirosław 2013-02-01 20:40:17 +01:00 • committed by Greg Kroah-Hartman
commit 9f3b795a62
19 changed files with 53 additions and 64 deletions
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4
drivers/base/class.c
View file

@ -420,8 +420,8 @@ EXPORT_SYMBOL_GPL(class_for_each_device);
* code. There's no locking restriction.
*/
struct device *class_find_device(struct class *class, struct device *start,
void *data,
int (*match)(struct device *, void *))
const void *data,
int (*match)(struct device *, const void *))
{
struct class_dev_iter iter;
struct device *dev;

4
drivers/base/core.c
View file

@ -1617,9 +1617,9 @@ struct device *device_create(struct class *class, struct device *parent,
}
EXPORT_SYMBOL_GPL(device_create);
static int __match_devt(struct device *dev, void *data)
static int __match_devt(struct device *dev, const void *data)
{
dev_t *devt = data;
const dev_t *devt = data;
return dev->devt == *devt;
}