target/linux/s3c24xx/patches-2.6.26/1233-device-model-Allow-the-creation-of-symlinks-on-sys.patch

   1 From 2dc4f2819aec1cdd3012cb28396a625d2efb00fd Mon Sep 17 00:00:00 2001
   2 From: Cesar Eduardo Barros <cesarb@cesarb.net>
   3 Date: Mon, 4 Aug 2008 08:34:50 +0100
   4 Subject: [PATCH] device model: Allow the creation of symlinks on /sys/bus/*/devices
   5
   6 Allows the direct creation of symlinks on /sys/bus/*/devices. This is needed
   7 for a compat symlink from gta01-pm-gps.0 to neo1973-pm-gps.0 on the Openmoko
   8 Neo1973 GTA01.
   9
  10 Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
  11 ---
  12  drivers/base/bus.c     |   23 +++++++++++++++++++++++
  13  include/linux/device.h |    5 +++++
  14  2 files changed, 28 insertions(+), 0 deletions(-)
  15
  16 diff --git a/drivers/base/bus.c b/drivers/base/bus.c
  17 index ef522ae..96d495d 100644
  18 --- a/drivers/base/bus.c
  19 +++ b/drivers/base/bus.c
  20 @@ -141,6 +141,29 @@ void bus_remove_file(struct bus_type *bus, struct bus_attribute *attr)
  21  }
  22  EXPORT_SYMBOL_GPL(bus_remove_file);
  23
  24 +int bus_create_device_link(struct bus_type *bus, struct kobject *target,
  25 +                          const char *name)
  26 +{
  27 +       int error;
  28 +       if (bus_get(bus)) {
  29 +               error = sysfs_create_link(&bus->p->devices_kset->kobj, target,
  30 +                                         name);
  31 +               bus_put(bus);
  32 +       } else
  33 +               error = -EINVAL;
  34 +       return error;
  35 +}
  36 +EXPORT_SYMBOL_GPL(bus_create_device_link);
  37 +
  38 +void bus_remove_device_link(struct bus_type *bus, const char *name)
  39 +{
  40 +       if (bus_get(bus)) {
  41 +               sysfs_remove_link(&bus->p->devices_kset->kobj, name);
  42 +               bus_put(bus);
  43 +       }
  44 +}
  45 +EXPORT_SYMBOL_GPL(bus_remove_device_link);
  46 +
  47  static struct kobj_type bus_ktype = {
  48         .sysfs_ops      = &bus_sysfs_ops,
  49  };
  50 diff --git a/include/linux/device.h b/include/linux/device.h
  51 index 6a2d04c..d29b005 100644
  52 --- a/include/linux/device.h
  53 +++ b/include/linux/device.h
  54 @@ -51,6 +51,11 @@ extern int __must_check bus_create_file(struct bus_type *,
  55                                         struct bus_attribute *);
  56  extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
  57
  58 +extern int __must_check bus_create_device_link(struct bus_type *bus,
  59 +                                              struct kobject *target,
  60 +                                              const char *name);
  61 +extern void bus_remove_device_link(struct bus_type *bus, const char *name);
  62 +
  63  struct bus_type {
  64         const char              *name;
  65         struct bus_attribute    *bus_attrs;
  66 --
  67 1.5.6.3
  68