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8#ifndef _ASM_UACCESS_H
9#define _ASM_UACCESS_H
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13#include <asm/sections.h>
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35#define __access_ok(addr, size) \
36 ((get_fs().seg == KERNEL_DS.seg) || \
37 (((unsigned long)addr < get_fs().seg) && \
38 (unsigned long)size < (get_fs().seg - (unsigned long)addr)))
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50unsigned long raw_copy_from_user(void *to, const void __user *from,
51 unsigned long n);
52unsigned long raw_copy_to_user(void __user *to, const void *from,
53 unsigned long n);
54#define INLINE_COPY_FROM_USER
55#define INLINE_COPY_TO_USER
56
57__kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count);
58#define __clear_user(a, s) __clear_user_hexagon((a), (s))
59
60#define __strncpy_from_user(dst, src, n) hexagon_strncpy_from_user(dst, src, n)
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62
63#define __strnlen_user __strnlen_user
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65extern long __strnlen_user(const char __user *src, long n);
66
67static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
68 long n);
69
70#include <asm-generic/uaccess.h>
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73static inline long hexagon_strncpy_from_user(char *dst, const char __user *src,
74 long n)
75{
76 long res = __strnlen_user(src, n);
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78 if (unlikely(!res))
79 return -EFAULT;
80
81 if (res > n) {
82 long left = raw_copy_from_user(dst, src, n);
83 if (unlikely(left))
84 memset(dst + (n - left), 0, left);
85 return n;
86 } else {
87 long left = raw_copy_from_user(dst, src, res);
88 if (unlikely(left))
89 memset(dst + (res - left), 0, left);
90 return res-1;
91 }
92}
93
94#endif
95