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author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-05-02 19:37:49 +0400 |
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committer | Frederic Weisbecker <fweisbec@gmail.com> | 2013-05-02 19:54:19 +0400 |
commit | c032862fba51a3ca504752d3a25186b324c5ce83 (patch) | |
tree | 955dc2ba4ab3df76ecc2bb780ee84aca04967e8d /drivers/rtc/class.c | |
parent | fda76e074c7737fc57855dd17c762e50ed526052 (diff) | |
parent | 8700c95adb033843fc163d112b9d21d4fda78018 (diff) | |
download | linux-c032862fba51a3ca504752d3a25186b324c5ce83.tar.xz |
Merge commit '8700c95adb03' into timers/nohz
The full dynticks tree needs the latest RCU and sched
upstream updates in order to fix some dependencies.
Merge a common upstream merge point that has these
updates.
Conflicts:
include/linux/perf_event.h
kernel/rcutree.h
kernel/rcutree_plugin.h
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Diffstat (limited to 'drivers/rtc/class.c')
-rw-r--r-- | drivers/rtc/class.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c index 9b742d3ffb94..66385402d20e 100644 --- a/drivers/rtc/class.c +++ b/drivers/rtc/class.c @@ -259,6 +259,76 @@ void rtc_device_unregister(struct rtc_device *rtc) } EXPORT_SYMBOL_GPL(rtc_device_unregister); +static void devm_rtc_device_release(struct device *dev, void *res) +{ + struct rtc_device *rtc = *(struct rtc_device **)res; + + rtc_device_unregister(rtc); +} + +static int devm_rtc_device_match(struct device *dev, void *res, void *data) +{ + struct rtc **r = res; + + return *r == data; +} + +/** + * devm_rtc_device_register - resource managed rtc_device_register() + * @dev: the device to register + * @name: the name of the device + * @ops: the rtc operations structure + * @owner: the module owner + * + * @return a struct rtc on success, or an ERR_PTR on error + * + * Managed rtc_device_register(). The rtc_device returned from this function + * are automatically freed on driver detach. See rtc_device_register() + * for more information. + */ + +struct rtc_device *devm_rtc_device_register(struct device *dev, + const char *name, + const struct rtc_class_ops *ops, + struct module *owner) +{ + struct rtc_device **ptr, *rtc; + + ptr = devres_alloc(devm_rtc_device_release, sizeof(*ptr), GFP_KERNEL); + if (!ptr) + return ERR_PTR(-ENOMEM); + + rtc = rtc_device_register(name, dev, ops, owner); + if (!IS_ERR(rtc)) { + *ptr = rtc; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return rtc; +} +EXPORT_SYMBOL_GPL(devm_rtc_device_register); + +/** + * devm_rtc_device_unregister - resource managed devm_rtc_device_unregister() + * @dev: the device to unregister + * @rtc: the RTC class device to unregister + * + * Deallocated a rtc allocated with devm_rtc_device_register(). Normally this + * function will not need to be called and the resource management code will + * ensure that the resource is freed. + */ +void devm_rtc_device_unregister(struct device *dev, struct rtc_device *rtc) +{ + int rc; + + rc = devres_release(dev, devm_rtc_device_release, + devm_rtc_device_match, rtc); + WARN_ON(rc); +} +EXPORT_SYMBOL_GPL(devm_rtc_device_unregister); + static int __init rtc_init(void) { rtc_class = class_create(THIS_MODULE, "rtc"); |