git.zerfleddert.de Git - ms2-kexec/blob - core.c

   1 /*
   2  * drivers/base/core.c - core driver model code (device registration, etc)
   3  *
   4  * Copyright (c) 2002-3 Patrick Mochel
   5  * Copyright (c) 2002-3 Open Source Development Labs
   6  * Copyright (c) 2006 Greg Kroah-Hartman <gregkh@suse.de>
   7  * Copyright (c) 2006 Novell, Inc.
   8  * This Edition is maintained by Matthew Veety (aliasxerog) <mveety@gmail.com>
   9  *
  10  * This file is released under the GPLv2
  11  *
  12  */
  13
  14 #include <linux/list.h>
  15 #include <linux/device.h>
  16 #include <linux/err.h>
  17 #include <linux/init.h>
  18 #include <linux/module.h>
  19 #include <linux/slab.h>
  20 #include <linux/string.h>
  21 #include <linux/kdev_t.h>
  22 #include <linux/notifier.h>
  23 #include <linux/genhd.h>
  24 #include <linux/kallsyms.h>
  25 #include <linux/semaphore.h>
  26 #include <linux/mutex.h>
  27
  28 /**
  29  * device_shutdown - call ->shutdown() on each device to shutdown.
  30  */
  31 void device_shutdown(void)
  32 {
  33         struct device *dev, *devn, *dummy_device;
  34         struct kset *devices_kset;
  35
  36         dummy_device = kzalloc(sizeof(*dummy_device), GFP_KERNEL);
  37
  38         /* init a dummy device to get to the devices kset */
  39         device_initialize(dummy_device);
  40         devices_kset=dummy_device->kobj.kset;
  41         put_device(dummy_device);
  42
  43         list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list,
  44                                 kobj.entry) {
  45                 if (dev->bus && dev->bus->shutdown) {
  46                         dev_dbg(dev, "shutdown\n");
  47                         dev->bus->shutdown(dev);
  48                 } else if (dev->driver && dev->driver->shutdown) {
  49                         dev_dbg(dev, "shutdown\n");
  50                         dev->driver->shutdown(dev);
  51                 }
  52         }
  53 }