Kevin P. Fleming writes:

Yes, I know busybox is in feature freeze. If this two-liner is too much
that's fine, but it's handy.

This patch allows busybox mount to support "-o move" just like it
supports "-o bind", which is the equivalent of util-linux "mount --move".

Usage is:

mount -o move /mnt/point/1 /mnt/point/2

where /mnt/point/1 is an already mounted filesystem; it will be moved to
/mnt/point/2.

util-linux/mount.c

@@ -75,6 +75,7 @@ enum {
 	MS_NOATIME = 1024,	/* Do not update access times. */
 	MS_NODIRATIME = 2048,	/* Do not update directory access times */
 	MS_BIND = 4096,		/* Use the new linux 2.4.x "mount --bind" feature */
+	MS_MOVE = 8192,		/* Use the new linux 2.4.x "mount --move" feature */
 };
 
 
@@ -117,6 +118,7 @@ static const struct mount_options mount_options[] = {
 	{"suid", ~MS_NOSUID, 0},
 	{"sync", ~0, MS_SYNCHRONOUS},
 	{"bind", ~0, MS_BIND},
+	{"move", ~0, MS_MOVE},
 	{0, 0, 0}
 };