uio.h

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/*
 *  Berkeley style UIO structures   -   Alan Cox 1994.
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 */
#ifndef _UAPI__LINUX_UIO_H
#define _UAPI__LINUX_UIO_H

#include <linux/compiler.h>
#include <linux/types.h>


struct iovec
{
    void __user *iov_base;  /* BSD uses caddr_t (1003.1g requires void *) */
    __kernel_size_t iov_len; /* Must be size_t (1003.1g) */
};

/*
 *  UIO_MAXIOV shall be at least 16 1003.1g (5.4.1.1)
 */
 
#define UIO_FASTIOV 8
#define UIO_MAXIOV  1024


#endif /* _UAPI__LINUX_UIO_H */