1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
2 /*
3  *	Berkeley style UIO structures	-	Alan Cox 1994.
4  *
5  *		This program is free software; you can redistribute it and/or
6  *		modify it under the terms of the GNU General Public License
7  *		as published by the Free Software Foundation; either version
8  *		2 of the License, or (at your option) any later version.
9  */
10 #ifndef _UAPI__LINUX_UIO_H
11 #define _UAPI__LINUX_UIO_H
12 
13 #include <linux/compiler.h>
14 #include <linux/types.h>
15 
16 
17 struct iovec
18 {
19 	void __user *iov_base;	/* BSD uses caddr_t (1003.1g requires void *) */
20 	__kernel_size_t iov_len; /* Must be size_t (1003.1g) */
21 };
22 
23 /*
24  *	UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
25  */
26 
27 #define UIO_FASTIOV	8
28 #define UIO_MAXIOV	1024
29 
30 
31 #endif /* _UAPI__LINUX_UIO_H */
32