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[linux.git] / arch / um / kernel / uaccess.c
1 /*
2  * Copyright (C) 2001 Chris Emerson ([email protected])
3  * Copyright (C) 2001, 2002 Jeff Dike ([email protected])
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
14 void __do_copy(void *to, const void *from, int n)
15 {
16         memcpy(to, from, n);
17 }
18
19
20 int __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 }
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