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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 <mirq-linux@rere.qmqm.pl>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michał Mirosław
2013-02-01 20:40:17 +01:00
committed by Greg Kroah-Hartman
parent 807be03cae
commit 9f3b795a62
19 changed files with 53 additions and 64 deletions
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4
include/linux/device.h
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@@ -395,8 +395,8 @@ extern int class_for_each_device(struct class *class, struct device *start,
void *data,
int (*fn)(struct device *dev, void *data));
extern struct device *class_find_device(struct class *class,
struct device *start, void *data,
int (*match)(struct device *, void *));
struct device *start, const void *data,
int (*match)(struct device *, const void *));
struct class_attribute {
struct attribute attr;

2
include/linux/power_supply.h
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@@ -224,7 +224,7 @@ struct power_supply_info {
int use_for_apm;
};
extern struct power_supply *power_supply_get_by_name(char *name);
extern struct power_supply *power_supply_get_by_name(const char *name);
extern void power_supply_changed(struct power_supply *psy);
extern int power_supply_am_i_supplied(struct power_supply *psy);
extern int power_supply_set_battery_charged(struct power_supply *psy);

2
include/linux/rtc.h
View File

@@ -148,7 +148,7 @@ extern int rtc_initialize_alarm(struct rtc_device *rtc,
extern void rtc_update_irq(struct rtc_device *rtc,
unsigned long num, unsigned long events);
extern struct rtc_device *rtc_class_open(char *name);
extern struct rtc_device *rtc_class_open(const char *name);
extern void rtc_class_close(struct rtc_device *rtc);
extern int rtc_irq_register(struct rtc_device *rtc,