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| author | Michał Mirosław <mirq-linux@rere.qmqm.pl> | 2013-02-01 20:40:17 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-02-06 12:18:56 -0800 |
| commit | 9f3b795a626ee79574595e06d1437fe0c7d51d29 (patch) | |
| tree | 1952cb2ac880c0e66f291916815c2a36b4ceb300 /kernel/power | |
| parent | 807be03cae191cb88e2f267adcd49aba785c658b (diff) | |
| download | lwn-9f3b795a626ee79574595e06d1437fe0c7d51d29.tar.gz lwn-9f3b795a626ee79574595e06d1437fe0c7d51d29.zip | |
driver-core: constify data for class_find_device()
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>
Diffstat (limited to 'kernel/power')
| -rw-r--r-- | kernel/power/suspend_test.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/power/suspend_test.c b/kernel/power/suspend_test.c index 25596e450ac7..9b2a1d58558d 100644 --- a/kernel/power/suspend_test.c +++ b/kernel/power/suspend_test.c @@ -112,7 +112,7 @@ static void __init test_wakealarm(struct rtc_device *rtc, suspend_state_t state) rtc_set_alarm(rtc, &alm); } -static int __init has_wakealarm(struct device *dev, void *name_ptr) +static int __init has_wakealarm(struct device *dev, const void *data) { struct rtc_device *candidate = to_rtc_device(dev); @@ -121,7 +121,6 @@ static int __init has_wakealarm(struct device *dev, void *name_ptr) if (!device_may_wakeup(candidate->dev.parent)) return 0; - *(const char **)name_ptr = dev_name(dev); return 1; } @@ -159,8 +158,8 @@ static int __init test_suspend(void) static char warn_no_rtc[] __initdata = KERN_WARNING "PM: no wakealarm-capable RTC driver is ready\n"; - char *pony = NULL; struct rtc_device *rtc = NULL; + struct device *dev; /* PM is initialized by now; is that state testable? */ if (test_state == PM_SUSPEND_ON) @@ -171,9 +170,9 @@ static int __init test_suspend(void) } /* RTCs have initialized by now too ... can we use one? */ - class_find_device(rtc_class, NULL, &pony, has_wakealarm); - if (pony) - rtc = rtc_class_open(pony); + dev = class_find_device(rtc_class, NULL, NULL, has_wakealarm); + if (dev) + rtc = rtc_class_open(dev_name(dev)); if (!rtc) { printk(warn_no_rtc); goto done; |