1/*
 2 * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
 3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 4 * Licensed under the GPL
 5 */
 6
 7/*
 8 * These are here rather than tt/uaccess.c because skas mode needs them in
 9 * order to do SIGBUS recovery when a tmpfs mount runs out of room.
10 */
11
12#include <linux/string.h>
13#include "os.h"
14
15static void __do_copy(void *to, const void *from, int n)
16{
17	memcpy(to, from, n);
18}
19
20
21int __do_copy_to_user(void *to, const void *from, int n,
22		      void **fault_addr, jmp_buf **fault_catcher)
23{
24	unsigned long fault;
25	int faulted;
26
27	fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
28			       __do_copy, &faulted);
29	if (!faulted)
30		return 0;
31	else
32		return n - (fault - (unsigned long) to);
33}