53 lines
925 B
C
53 lines
925 B
C
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#ifndef _ASM_UACCESS_H
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#define _ASM_UACCESS_H
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#include <linux/string.h>
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static inline __must_check long __copy_from_user(void *to,
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const void __user * from, unsigned long n)
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{
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if (__builtin_constant_p(n)) {
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switch(n) {
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case 1:
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*(u8 *)to = *(u8 __force *)from;
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return 0;
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case 2:
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*(u16 *)to = *(u16 __force *)from;
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return 0;
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case 4:
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*(u32 *)to = *(u32 __force *)from;
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return 0;
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}
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}
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memcpy(to, (const void __force *)from, n);
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return 0;
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}
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static inline __must_check long __copy_to_user(void __user *to,
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const void *from, unsigned long n)
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{
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if (__builtin_constant_p(n)) {
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switch(n) {
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case 1:
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*(u8 __force *)to = *(u8 *)from;
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return 0;
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case 2:
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*(u16 __force *)to = *(u16 *)from;
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return 0;
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case 4:
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*(u32 __force *)to = *(u32 *)from;
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return 0;
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default:
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break;
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}
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}
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memcpy((void __force *)to, from, n);
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return 0;
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}
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#include <asm-generic/uaccess.h>
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#endif
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