uclibc-ng/libc/sysdeps/linux/mips/readahead.c

/* Provide kernel hint to read ahead.
   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <sys/syscall.h>

#if defined __NR_readahead && defined __UCLIBC_HAS_LFS__ && defined __USE_GNU
# include <fcntl.h>
# include <endian.h>

ssize_t readahead(int fd, off64_t offset, size_t count)
{
# if _MIPS_SIM == _ABIO32
	return INLINE_SYSCALL (readahead, 5, fd, 0,
			       __LONG_LONG_PAIR ((off_t) (offset >> 32), (off_t) offset),
			       count);
# else /* N32 || N64 */
	return INLINE_SYSCALL (readahead, 3, fd, offset, count);
# endif
}
#endif