--- zzzz-none-000/linux-3.10.107/kernel/exec_domain.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/kernel/exec_domain.c	2021-02-04 17:41:59.000000000 +0000
@@ -20,142 +20,10 @@
 #include <linux/types.h>
 #include <linux/fs_struct.h>
 
-
-static void default_handler(int, struct pt_regs *);
-
-static struct exec_domain *exec_domains = &default_exec_domain;
-static DEFINE_RWLOCK(exec_domains_lock);
-
-
-static unsigned long ident_map[32] = {
-	0,	1,	2,	3,	4,	5,	6,	7,
-	8,	9,	10,	11,	12,	13,	14,	15,
-	16,	17,	18,	19,	20,	21,	22,	23,
-	24,	25,	26,	27,	28,	29,	30,	31
-};
-
-struct exec_domain default_exec_domain = {
-	.name		= "Linux",		/* name */
-	.handler	= default_handler,	/* lcall7 causes a seg fault. */
-	.pers_low	= 0, 			/* PER_LINUX personality. */
-	.pers_high	= 0,			/* PER_LINUX personality. */
-	.signal_map	= ident_map,		/* Identity map signals. */
-	.signal_invmap	= ident_map,		/*  - both ways. */
-};
-
-
-static void
-default_handler(int segment, struct pt_regs *regp)
-{
-	set_personality(0);
-
-	if (current_thread_info()->exec_domain->handler != default_handler)
-		current_thread_info()->exec_domain->handler(segment, regp);
-	else
-		send_sig(SIGSEGV, current, 1);
-}
-
-static struct exec_domain *
-lookup_exec_domain(unsigned int personality)
-{
-	unsigned int pers = personality(personality);
-	struct exec_domain *ep;
-
-	read_lock(&exec_domains_lock);
-	for (ep = exec_domains; ep; ep = ep->next) {
-		if (pers >= ep->pers_low && pers <= ep->pers_high)
-			if (try_module_get(ep->module))
-				goto out;
-	}
-
-#ifdef CONFIG_MODULES
-	read_unlock(&exec_domains_lock);
-	request_module("personality-%d", pers);
-	read_lock(&exec_domains_lock);
-
-	for (ep = exec_domains; ep; ep = ep->next) {
-		if (pers >= ep->pers_low && pers <= ep->pers_high)
-			if (try_module_get(ep->module))
-				goto out;
-	}
-#endif
-
-	ep = &default_exec_domain;
-out:
-	read_unlock(&exec_domains_lock);
-	return (ep);
-}
-
-int
-register_exec_domain(struct exec_domain *ep)
-{
-	struct exec_domain	*tmp;
-	int			err = -EBUSY;
-
-	if (ep == NULL)
-		return -EINVAL;
-
-	if (ep->next != NULL)
-		return -EBUSY;
-
-	write_lock(&exec_domains_lock);
-	for (tmp = exec_domains; tmp; tmp = tmp->next) {
-		if (tmp == ep)
-			goto out;
-	}
-
-	ep->next = exec_domains;
-	exec_domains = ep;
-	err = 0;
-
-out:
-	write_unlock(&exec_domains_lock);
-	return (err);
-}
-
-int
-unregister_exec_domain(struct exec_domain *ep)
-{
-	struct exec_domain	**epp;
-
-	epp = &exec_domains;
-	write_lock(&exec_domains_lock);
-	for (epp = &exec_domains; *epp; epp = &(*epp)->next) {
-		if (ep == *epp)
-			goto unregister;
-	}
-	write_unlock(&exec_domains_lock);
-	return -EINVAL;
-
-unregister:
-	*epp = ep->next;
-	ep->next = NULL;
-	write_unlock(&exec_domains_lock);
-	return 0;
-}
-
-int __set_personality(unsigned int personality)
-{
-	struct exec_domain *oep = current_thread_info()->exec_domain;
-
-	current_thread_info()->exec_domain = lookup_exec_domain(personality);
-	current->personality = personality;
-	module_put(oep->module);
-
-	return 0;
-}
-
 #ifdef CONFIG_PROC_FS
 static int execdomains_proc_show(struct seq_file *m, void *v)
 {
-	struct exec_domain	*ep;
-
-	read_lock(&exec_domains_lock);
-	for (ep = exec_domains; ep; ep = ep->next)
-		seq_printf(m, "%d-%d\t%-16s\t[%s]\n",
-			       ep->pers_low, ep->pers_high, ep->name,
-			       module_name(ep->module));
-	read_unlock(&exec_domains_lock);
+	seq_puts(m, "0-0\tLinux           \t[kernel]\n");
 	return 0;
 }
 
@@ -173,6 +41,8 @@
 
 static int __init proc_execdomains_init(void)
 {
+	if (IS_ENABLED(CONFIG_PROC_STRIPPED))
+		return 0;
 	proc_create("execdomains", 0, NULL, &execdomains_proc_fops);
 	return 0;
 }
@@ -188,8 +58,3 @@
 
 	return old;
 }
-
-
-EXPORT_SYMBOL(register_exec_domain);
-EXPORT_SYMBOL(unregister_exec_domain);
-EXPORT_SYMBOL(__set_personality);