--- zzzz-none-000/linux-3.10.107/fs/proc/proc_tty.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/fs/proc/proc_tty.c	2021-02-04 17:41:59.000000000 +0000
@@ -18,7 +18,7 @@
 /*
  * The /proc/tty directory inodes...
  */
-static struct proc_dir_entry *proc_tty_ldisc, *proc_tty_driver;
+static struct proc_dir_entry *proc_tty_driver;
 
 /*
  * This is the handler for /proc/tty/drivers
@@ -143,7 +143,10 @@
 void proc_tty_register_driver(struct tty_driver *driver)
 {
 	struct proc_dir_entry *ent;
-		
+
+	if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+		return;
+
 	if (!driver->driver_name || driver->proc_entry ||
 	    !driver->ops->proc_fops)
 		return;
@@ -160,6 +163,9 @@
 {
 	struct proc_dir_entry *ent;
 
+	if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+		return;
+
 	ent = driver->proc_entry;
 	if (!ent)
 		return;
@@ -174,9 +180,12 @@
  */
 void __init proc_tty_init(void)
 {
+	if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+		return;
+
 	if (!proc_mkdir("tty", NULL))
 		return;
-	proc_tty_ldisc = proc_mkdir("tty/ldisc", NULL);
+	proc_mkdir("tty/ldisc", NULL);	/* Preserved: it's userspace visible */
 	/*
 	 * /proc/tty/driver/serial reveals the exact character counts for
 	 * serial links which is just too easy to abuse for inferring