Linux Kernel  3.7.1
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uaccess.h
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1 /*
2  * linux/arch/unicore32/include/asm/uaccess.h
3  *
4  * Code specific to PKUnity SoC and UniCore ISA
5  *
6  * Copyright (C) 2001-2010 GUAN Xue-tao
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12 #ifndef __UNICORE_UACCESS_H__
13 #define __UNICORE_UACCESS_H__
14 
15 #include <linux/thread_info.h>
16 #include <linux/errno.h>
17 
18 #include <asm/memory.h>
19 
20 #define __copy_from_user __copy_from_user
21 #define __copy_to_user __copy_to_user
22 #define __strncpy_from_user __strncpy_from_user
23 #define __strnlen_user __strnlen_user
24 #define __clear_user __clear_user
25 
26 #define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
27 #define __user_ok(addr, size) (((size) <= TASK_SIZE) \
28  && ((addr) <= TASK_SIZE - (size)))
29 #define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
30 
31 extern unsigned long __must_check
32 __copy_from_user(void *to, const void __user *from, unsigned long n);
33 extern unsigned long __must_check
34 __copy_to_user(void __user *to, const void *from, unsigned long n);
35 extern unsigned long __must_check
36 __clear_user(void __user *addr, unsigned long n);
37 extern unsigned long __must_check
38 __strncpy_from_user(char *to, const char __user *from, unsigned long count);
39 extern unsigned long
40 __strnlen_user(const char __user *s, long n);
41 
42 #include <asm-generic/uaccess.h>
43 
44 extern int fixup_exception(struct pt_regs *regs);
45 
46 #endif /* __UNICORE_UACCESS_H__ */