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kernel/linux-rt-4.4.41/arch/sh/include/asm/uaccess_64.h 2.2 KB
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  #ifndef __ASM_SH_UACCESS_64_H
  #define __ASM_SH_UACCESS_64_H
  
  /*
   * include/asm-sh/uaccess_64.h
   *
   * Copyright (C) 2000, 2001  Paolo Alberelli
   * Copyright (C) 2003, 2004  Paul Mundt
   *
   * User space memory access functions
   *
   * Copyright (C) 1999  Niibe Yutaka
   *
   *  Based on:
   *     MIPS implementation version 1.15 by
   *              Copyright (C) 1996, 1997, 1998 by Ralf Baechle
   *     and i386 version.
   *
   * This file is subject to the terms and conditions of the GNU General Public
   * License.  See the file "COPYING" in the main directory of this archive
   * for more details.
   */
  
  #define __get_user_size(x,ptr,size,retval)			\
  do {								\
  	retval = 0;						\
  	x = 0;							\
  	switch (size) {						\
  	case 1:							\
  		retval = __get_user_asm_b((void *)&x,		\
  					  (long)ptr);		\
  		break;						\
  	case 2:							\
  		retval = __get_user_asm_w((void *)&x,		\
  					  (long)ptr);		\
  		break;						\
  	case 4:							\
  		retval = __get_user_asm_l((void *)&x,		\
  					  (long)ptr);		\
  		break;						\
  	case 8:							\
  		retval = __get_user_asm_q((void *)&x,		\
  					  (long)ptr);		\
  		break;						\
  	default:						\
  		__get_user_unknown();				\
  		break;						\
  	}							\
  } while (0)
  
  extern long __get_user_asm_b(void *, long);
  extern long __get_user_asm_w(void *, long);
  extern long __get_user_asm_l(void *, long);
  extern long __get_user_asm_q(void *, long);
  extern void __get_user_unknown(void);
  
  #define __put_user_size(x,ptr,size,retval)			\
  do {								\
  	retval = 0;						\
  	switch (size) {						\
  	case 1:							\
  		retval = __put_user_asm_b((void *)&x,		\
  					  (__force long)ptr);	\
  		break;						\
  	case 2:							\
  		retval = __put_user_asm_w((void *)&x,		\
  					  (__force long)ptr);	\
  		break;						\
  	case 4:							\
  		retval = __put_user_asm_l((void *)&x,		\
  					  (__force long)ptr);	\
  		break;						\
  	case 8:							\
  		retval = __put_user_asm_q((void *)&x,		\
  					  (__force long)ptr);	\
  		break;						\
  	default:						\
  		__put_user_unknown();				\
  	}							\
  } while (0)
  
  extern long __put_user_asm_b(void *, long);
  extern long __put_user_asm_w(void *, long);
  extern long __put_user_asm_l(void *, long);
  extern long __put_user_asm_q(void *, long);
  extern void __put_user_unknown(void);
  
  #endif /* __ASM_SH_UACCESS_64_H */