This interface is called to sync listener->event_count and device event count in multi-instances case.
Change-Id: Ibb1e4888ce55b4993394b61e4bcd6dce8b8291f0 Signed-off-by: Xiaolong Ye <[email protected]> --- drivers/uio/uio.c | 12 ++++++++++++ include/linux/uio_driver.h | 1 + 2 files changed, 13 insertions(+) diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index ba47563..95d559f 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -408,6 +408,18 @@ void uio_event_notify(struct uio_info *info) EXPORT_SYMBOL_GPL(uio_event_notify); /** + * uio_event_sync - sync listener's event count with UIO device + * @listener: uio_listener structure + */ +void uio_event_sync(struct uio_listener *listener) +{ + struct uio_device *idev = listener->dev; + + listener->event_count = atomic_read(&idev->event); +} +EXPORT_SYMBOL_GPL(uio_event_sync); + +/** * uio_interrupt - hardware interrupt handler * @irq: IRQ number, can be UIO_IRQ_CYCLIC for cyclic timer * @dev_id: Pointer to the devices uio_device structure diff --git a/include/linux/uio_driver.h b/include/linux/uio_driver.h index 1ad4724..d10e634 100644 --- a/include/linux/uio_driver.h +++ b/include/linux/uio_driver.h @@ -108,6 +108,7 @@ extern int __must_check extern void uio_unregister_device(struct uio_info *info); extern void uio_event_notify(struct uio_info *info); +extern void uio_event_sync(struct uio_listener *listener); /* defines for uio_info->irq */ #define UIO_IRQ_CUSTOM -1 -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
