sys/dev/drm/linux_workqueue.c

   1 /*
   2  * Copyright (c) 2015 François Tigeot
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include <drm/drmP.h>
  28 #include <linux/workqueue.h>
  29
  30 struct workqueue_struct *system_wq;
  31 struct workqueue_struct *system_long_wq;
  32 struct workqueue_struct *system_power_efficient_wq;
  33
  34 static int init_workqueues(void *arg)
  35 {
  36         system_wq = alloc_workqueue("system_wq", 0, 1);
  37         system_long_wq = alloc_workqueue("system_long_wq", 0, 1);
  38         system_power_efficient_wq = alloc_workqueue("system_power_efficient_wq", 0, 1);
  39
  40         return 0;
  41 }
  42
  43 static int destroy_workqueues(void *arg)
  44 {
  45         destroy_workqueue(system_wq);
  46         destroy_workqueue(system_long_wq);
  47         destroy_workqueue(system_power_efficient_wq);
  48
  49         return 0;
  50 }
  51
  52 SYSINIT(linux_workqueue_init, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, init_workqueues, NULL);
  53 SYSUNINIT(linux_workqueue_destroy, SI_SUB_DRIVERS, SI_ORDER_MIDDLE, destroy_workqueues, NULL);