forked from Minki/linux
66959ed0e4
virtio wants to write bitwise types to userspace using put_user. At the moment this triggers sparse errors, since the value is passed through an integer. For example: __le32 __user *p; __le32 x; put_user(x, p); is safe, but currently triggers a sparse warning. Fix that up using __force. Note: this does not suppress any useful sparse checks since caller assigns x to typeof(*p), which in turn forces all the necessary type checks. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
#ifndef __ASM_SH_UACCESS_64_H
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#define __ASM_SH_UACCESS_64_H
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/*
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* include/asm-sh/uaccess_64.h
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*
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* Copyright (C) 2000, 2001 Paolo Alberelli
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* Copyright (C) 2003, 2004 Paul Mundt
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*
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* User space memory access functions
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*
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* Copyright (C) 1999 Niibe Yutaka
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*
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* Based on:
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* MIPS implementation version 1.15 by
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* Copyright (C) 1996, 1997, 1998 by Ralf Baechle
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* and i386 version.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#define __get_user_size(x,ptr,size,retval) \
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do { \
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retval = 0; \
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switch (size) { \
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case 1: \
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retval = __get_user_asm_b((void *)&x, \
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(long)ptr); \
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break; \
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case 2: \
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retval = __get_user_asm_w((void *)&x, \
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(long)ptr); \
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break; \
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case 4: \
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retval = __get_user_asm_l((void *)&x, \
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(long)ptr); \
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break; \
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case 8: \
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retval = __get_user_asm_q((void *)&x, \
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(long)ptr); \
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break; \
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default: \
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__get_user_unknown(); \
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break; \
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} \
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} while (0)
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extern long __get_user_asm_b(void *, long);
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extern long __get_user_asm_w(void *, long);
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extern long __get_user_asm_l(void *, long);
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extern long __get_user_asm_q(void *, long);
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extern void __get_user_unknown(void);
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#define __put_user_size(x,ptr,size,retval) \
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do { \
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retval = 0; \
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switch (size) { \
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case 1: \
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retval = __put_user_asm_b((void *)&x, \
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(__force long)ptr); \
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break; \
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case 2: \
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retval = __put_user_asm_w((void *)&x, \
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(__force long)ptr); \
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break; \
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case 4: \
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retval = __put_user_asm_l((void *)&x, \
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(__force long)ptr); \
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break; \
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case 8: \
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retval = __put_user_asm_q((void *)&x, \
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(__force long)ptr); \
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break; \
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default: \
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__put_user_unknown(); \
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} \
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} while (0)
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extern long __put_user_asm_b(void *, long);
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extern long __put_user_asm_w(void *, long);
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extern long __put_user_asm_l(void *, long);
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extern long __put_user_asm_q(void *, long);
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extern void __put_user_unknown(void);
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#endif /* __ASM_SH_UACCESS_64_H */
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