+/*
+ * Get an inotify_kernel_event if one exists and is small
+ * enough to fit in "count". Return an error pointer if
+ * not large enough.
+ *
+ * Called with the device ev_mutex held.
+ */
+static struct inotify_kernel_event *get_one_event(struct inotify_device *dev,
+ size_t count)
+{
+ size_t event_size = sizeof(struct inotify_event);
+ struct inotify_kernel_event *kevent;
+
+ if (list_empty(&dev->events))
+ return NULL;
+
+ kevent = inotify_dev_get_event(dev);
+ if (kevent->name)
+ event_size += kevent->event.len;
+
+ if (event_size > count)
+ return ERR_PTR(-EINVAL);
+
+ remove_kevent(dev, kevent);
+ return kevent;
+}
+
+/*
+ * Copy an event to user space, returning how much we copied.
+ *
+ * We already checked that the event size is smaller than the
+ * buffer we had in "get_one_event()" above.
+ */
+static ssize_t copy_event_to_user(struct inotify_kernel_event *kevent,
+ char __user *buf)
+{
+ size_t event_size = sizeof(struct inotify_event);
+
+ if (copy_to_user(buf, &kevent->event, event_size))
+ return -EFAULT;
+
+ if (kevent->name) {
+ buf += event_size;
+
+ if (copy_to_user(buf, kevent->name, kevent->event.len))
+ return -EFAULT;
+
+ event_size += kevent->event.len;
+ }
+ return event_size;
+}
+