Add a kernel function to delist our kernel character devices, so that

the device name can be re-used right away in case we are destroying
the character devices in the background.

MFC after:	4 days
Reported by:	dchagin@

1 files changed, 17 insertions, 0 deletions

diff --git a/sys/kern/kern_conf.c b/sys/kern/kern_conf.c
index d15e5da..8b1fdc1 100644
--- a/sys/kern/kern_conf.c
+++ b/sys/kern/kern_conf.c
@@ -1114,6 +1114,23 @@ destroy_devl(struct cdev *dev)
 	}
 }
 
+static void
+delist_dev_locked(struct cdev *dev)
+{
+	struct cdev *child;
+	devfs_destroy(dev);
+	LIST_FOREACH(child, &dev->si_children, si_siblings)
+		delist_dev_locked(child);
+}
+
+void
+delist_dev(struct cdev *dev)
+{
+	dev_lock();
+	delist_dev_locked(dev);
+	dev_unlock();
+}
+
 void
 destroy_dev(struct cdev *dev)
 {