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From 2dc4f2819aec1cdd3012cb28396a625d2efb00fd Mon Sep 17 00:00:00 2001
From: Cesar Eduardo Barros <cesarb@cesarb.net>
Date: Mon, 4 Aug 2008 08:34:50 +0100
Subject: [PATCH] device model: Allow the creation of symlinks on /sys/bus/*/devices
Allows the direct creation of symlinks on /sys/bus/*/devices. This is needed
for a compat symlink from gta01-pm-gps.0 to neo1973-pm-gps.0 on the Openmoko
Neo1973 GTA01.
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
---
drivers/base/bus.c | 23 +++++++++++++++++++++++
include/linux/device.h | 5 +++++
2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index ef522ae..96d495d 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -141,6 +141,29 @@ void bus_remove_file(struct bus_type *bus, struct bus_attribute *attr)
}
EXPORT_SYMBOL_GPL(bus_remove_file);
+int bus_create_device_link(struct bus_type *bus, struct kobject *target,
+ const char *name)
+{
+ int error;
+ if (bus_get(bus)) {
+ error = sysfs_create_link(&bus->p->devices_kset->kobj, target,
+ name);
+ bus_put(bus);
+ } else
+ error = -EINVAL;
+ return error;
+}
+EXPORT_SYMBOL_GPL(bus_create_device_link);
+
+void bus_remove_device_link(struct bus_type *bus, const char *name)
+{
+ if (bus_get(bus)) {
+ sysfs_remove_link(&bus->p->devices_kset->kobj, name);
+ bus_put(bus);
+ }
+}
+EXPORT_SYMBOL_GPL(bus_remove_device_link);
+
static struct kobj_type bus_ktype = {
.sysfs_ops = &bus_sysfs_ops,
};
diff --git a/include/linux/device.h b/include/linux/device.h
index 6a2d04c..d29b005 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -51,6 +51,11 @@ extern int __must_check bus_create_file(struct bus_type *,
struct bus_attribute *);
extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
+extern int __must_check bus_create_device_link(struct bus_type *bus,
+ struct kobject *target,
+ const char *name);
+extern void bus_remove_device_link(struct bus_type *bus, const char *name);
+
struct bus_type {
const char *name;
struct bus_attribute *bus_attrs;
--
1.5.6.3
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