1  /* Copyright (C) 1994-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <sys/types.h>
      19  #include <sys/mman.h>
      20  #include <errno.h>
      21  
      22  /* Synchronize the region starting at ADDR and extending LEN bytes with the
      23     file it maps.  Filesystem operations on a file being mapped are
      24     unpredictable before this is done.  */
      25  
      26  int
      27  msync (void *addr, size_t len, int flags)
      28  {
      29    __set_errno (ENOSYS);
      30    return -1;
      31  }
      32  
      33  stub_warning (msync)