mount: add note about MS_BIND and _netdev

Addresses: https://github.com/karelzak/util-linux/issues/697
Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/sys-utils/mount.8 b/sys-utils/mount.8
index 8ee0a03c5865d217f17edc2c6fae773341df114a..da0ac5b8b0ce315a0fd09acfdf3b754a09afca32 100644 (file)
--- a/sys-utils/mount.8
+++ b/sys-utils/mount.8
@@ -383,8 +383,11 @@ a second place by using:
 .I olddir newdir
 .RE
 
-Note that the filesystem mount options will remain the same as those
-on the original mount point.
+Note that the filesystem mount options maintained by kernel will remain the same as those
+on the original mount point.  The userspace mount options (e.g. _netdev) will not be copied
+by
+.BR mount (8)
+and it's necessary explicitly specify the options on mount command line.
 
 .BR mount (8)
 since v2.27 allows to change the mount options by passing the