FreeBSD/Linux Kernel Cross Reference
sys/kern/subr_xxx.c

     /*      $NetBSD: subr_xxx.c,v 1.13 2003/08/07 16:31:54 agc Exp $        */
     
     /*
      * Copyright (c) 1982, 1986, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)subr_xxx.c  8.3 (Berkeley) 3/29/95
     */
    
    /*
     * Miscellaneous trivial functions, including many
     * that are often inline-expanded or done in assembler.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: subr_xxx.c,v 1.13 2003/08/07 16:31:54 agc Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    
    #include <machine/cpu.h>
    
    /*
     * Unsupported device function (e.g. writing to read-only device).
     */
    int
    enodev()
    {
    
            return (ENODEV);
    }
    
    /*
     * Unconfigured device function; driver not configured.
     */
    int
    enxio()
    {
    
            return (ENXIO);
    }
    
    /*
     * Unsupported ioctl function.
     */
    int
    enoioctl()
    {
    
            return (ENOTTY);
    }
    
    /*
     * Unsupported system function.
     * This is used for an otherwise-reasonable operation
     * that is not supported by the current system binary.
     */
    int
    enosys ()
    {
    
            return (ENOSYS);
    }
    
    /*
     * Return error for operation not supported
     * on a specific object or file type.
     */
    int
    eopnotsupp()
    {
    
            return (EOPNOTSUPP);
    }
    
   /*
    * Generic null operation, always returns success.
    */
   /*ARGSUSED*/
   int
   nullop(v)
           void *v;
   {
   
           return (0);
   }

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