include/linux/delay_compat.h

   1 /*
   2  *  Copyright (C) 2007-2013 Lawrence Livermore National Security, LLC.
   3  *  Copyright (C) 2007 The Regents of the University of California.
   4  *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
   5  *  Written by Brian Behlendorf <behlendorf1@llnl.gov>.
   6  *  UCRL-CODE-235197
   7  *
   8  *  This file is part of the SPL, Solaris Porting Layer.
   9  *  For details, see <http://zfsonlinux.org/>.
  10  *
  11  *  The SPL is free software; you can redistribute it and/or modify it
  12  *  under the terms of the GNU General Public License as published by the
  13  *  Free Software Foundation; either version 2 of the License, or (at your
  14  *  option) any later version.
  15  *
  16  *  The SPL is distributed in the hope that it will be useful, but WITHOUT
  17  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19  *  for more details.
  20  *
  21  *  You should have received a copy of the GNU General Public License along
  22  *  with the SPL.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24
  25 #ifndef _SPL_DELAY_COMPAT_H
  26 #define _SPL_DELAY_COMPAT_H
  27
  28 #include <linux/delay.h>
  29 #include <linux/time.h>
  30
  31 /* usleep_range() introduced in 2.6.36 */
  32 #ifndef HAVE_USLEEP_RANGE
  33
  34 static inline void
  35 usleep_range(unsigned long min, unsigned long max)
  36 {
  37         unsigned int min_ms = min / USEC_PER_MSEC;
  38
  39         if (min >= MAX_UDELAY_MS)
  40                 msleep(min_ms);
  41         else
  42                 udelay(min);
  43 }
  44
  45 #endif /* HAVE_USLEEP_RANGE */
  46
  47 #endif /* _SPL_DELAY_COMPAT_H */