1/* 2 * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk) 3 * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com) 4 * Licensed under the GPL 5 */ 6 7/* These are here rather than tt/uaccess.c because skas mode needs them in 8 * order to do SIGBUS recovery when a tmpfs mount runs out of room. 9 */ 10 11#include <linux/string.h> 12#include "os.h" 13 14void __do_copy(void *to, const void *from, int n) 15{ 16 memcpy(to, from, n); 17} 18 19 20int __do_copy_to_user(void *to, const void *from, int n, 21 void **fault_addr, void **fault_catcher) 22{ 23 unsigned long fault; 24 int faulted; 25 26 fault = __do_user_copy(to, from, n, fault_addr, fault_catcher, 27 __do_copy, &faulted); 28 if(!faulted) return(0); 29 else return(n - (fault - (unsigned long) to)); 30} 31